ActiveDisclosure Negative Values Report
Created 11/04/21 19:29:47 from Project MNTX_Master.docx for Period Ending 9/30/2021
The Negative Values Report lists all fact values with a negative sign captured in the XBRL document. Based on SEC Staff Observations, most XBRL tagged numbers are expected to be positive. All negative facts must be researched for appropriateness.
 
Element Name
Disclosure Title
Element Label
Instance Value
Value
Period Ending
Period Type
Data Type
Balance
Label Role
Axis / Member
us-gaap:RetainedEarningsAccumulatedDeficit
Statement - Condensed Consolidated Balance Sheets (Unaudited)
Retained deficit 
-60371000 
(60,371) 
9/30/2021 - Instant 
instant 
monetaryItemType 
credit 
 
 
us-gaap:RetainedEarningsAccumulatedDeficit
Statement - Condensed Consolidated Balance Sheets (Unaudited)
Retained deficit 
-63863000 
(63,863) 
12/31/2020 - Instant 
instant 
monetaryItemType 
credit 
 
 
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
Statement - Condensed Consolidated Balance Sheets (Unaudited)
Accumulated other comprehensive loss 
-3450000 
(3,450) 
9/30/2021 - Instant 
instant 
monetaryItemType 
credit 
 
 
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
Statement - Condensed Consolidated Balance Sheets (Unaudited)
Accumulated other comprehensive loss 
-1708000 
(1,708) 
12/31/2020 - Instant 
instant 
monetaryItemType 
credit 
 
 
us-gaap:OperatingIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Operating income (loss) 
-155000 
(155) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:OperatingIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Operating income (loss) 
-591000 
(591) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:OperatingIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Operating income (loss) 
-7757000 
(7,757) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Foreign currency transaction loss 
-121000 
(121) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Foreign currency transaction loss 
-229000 
(229) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Foreign currency transaction loss 
-421000 
(421) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:ForeignCurrencyTransactionGainLossBeforeTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Foreign currency transaction loss 
-671000 
(671) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:OtherNonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Other expense 
-102000 
(102) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:OtherNonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Other expense 
-341000 
(341) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:OtherNonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Other expense 
-117000 
(117) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:OtherNonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Other expense 
-497000 
(497) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:NonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Total other income (expense) 
-712000 
(712) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:NonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Total other income (expense) 
-794000 
(794) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:NonoperatingIncomeExpense
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Total other income (expense) 
-3326000 
(3,326) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) before income taxes from continuing operations 
-867000 
(867) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) before income taxes from continuing operations 
-1385000 
(1,385) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) before income taxes from continuing operations 
-11083000 
(11,083) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeTaxExpenseBenefit
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income tax expense (benefit) from continuing operations 
-191000 
(191) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:IncomeLossFromContinuingOperations
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) from continuing operations 
-1101000 
(1,101) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperations
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) from continuing operations 
-1447000 
(1,447) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperations
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) from continuing operations 
-10892000 
(10,892) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from operations of discontinued operations 
-120000 
(120) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from operations of discontinued operations 
-831000 
(831) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-124000 
(124) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-832000 
(832) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-1101000 
(1,101) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-1571000 
(1,571) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-11724000 
(11,724) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.06 
$(0.06) 
9/30/2021 - 3 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.07 
$(0.07) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.55 
$(0.55) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-0.01 
$(0.01) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-0.04 
$(0.04) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:EarningsPerShareBasic
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.06 
$(0.06) 
9/30/2021 - 3 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:EarningsPerShareBasic
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.08 
$(0.08) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:EarningsPerShareBasic
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.59 
$(0.59) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.06 
$(0.06) 
9/30/2021 - 3 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.07 
$(0.07) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Income (loss) from continuing operations 
-0.55 
$(0.55) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
Verbose Label 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-0.01 
$(0.01) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Loss from discontinued operations 
-0.04 
$(0.04) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:EarningsPerShareDiluted
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.06 
$(0.06) 
9/30/2021 - 3 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:EarningsPerShareDiluted
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.08 
$(0.08) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:EarningsPerShareDiluted
Statement - Condensed Consolidated Statements of Operations (Unaudited)
Net income (loss) 
-0.59 
$(0.59) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
Total Label 
 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Foreign currency translation adjustments 
-766000 
(766) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Foreign currency translation adjustments 
-1742000 
(1,742) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:OtherComprehensiveIncomeLossNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Total other comprehensive income (loss) 
-766000 
(766) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:OtherComprehensiveIncomeLossNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Total other comprehensive income (loss) 
-1742000 
(1,742) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:ComprehensiveIncomeNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Total comprehensive income (loss) 
-1867000 
$(1,867) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:ComprehensiveIncomeNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Total comprehensive income (loss) 
-518000 
$(518) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:ComprehensiveIncomeNetOfTax
Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited)
Total comprehensive income (loss) 
-10860000 
$(10,860) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance at beginning of the year 
-63863000 
$(63,863) 
12/31/2020 - Instant 
instant 
monetaryItemType 
credit 
Period Start Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance at beginning of the year 
-1708000 
$(1,708) 
12/31/2020 - Instant 
instant 
monetaryItemType 
credit 
Period Start Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-772000 
(772) 
3/31/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-772000 
(772) 
3/31/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (Loss) on foreign currency translation 
-1198000 
(1,198) 
3/31/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (Loss) on foreign currency translation 
-1198000 
(1,198) 
3/31/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-584000 
(584) 
3/31/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-64635000 
$(64,635) 
3/31/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-2906000 
$(2,906) 
3/31/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (loss) on foreign currency translation 
-26000 
(26) 
6/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-44000 
(44) 
6/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-59270000 
$(59,270) 
6/30/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-2684000 
$(2,684) 
6/30/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-1101000 
(1,101) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (loss) on foreign currency translation 
-760000 
(760) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-136000 
(136) 
9/30/2021 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-60371000 
$(60,371) 
9/30/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-3450000 
$(3,450) 
9/30/2021 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance at beginning of the year 
-50253000 
$(50,253) 
12/31/2019 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance at beginning of the year 
-3700000 
$(3,700) 
12/31/2019 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-7476000 
(7,476) 
3/31/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-7476000 
(7,476) 
3/31/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (Loss) on foreign currency translation 
-508000 
(508) 
3/31/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Gain (Loss) on foreign currency translation 
-508000 
(508) 
3/31/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-352000 
(352) 
3/31/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-57729000 
$(57,729) 
3/31/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-4208000 
$(4,208) 
3/31/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-2677000 
(2,677) 
6/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-2677000 
(2,677) 
6/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-86000 
(86) 
6/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-60406000 
$(60,406) 
6/30/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-3889000 
$(3,889) 
6/30/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AccumulatedOtherComprehensiveIncomeMember; 
us-gaap:NetIncomeLoss
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Net Income (loss) 
-1571000 
(1,571) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Verbose Label 
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mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-143000 
(143) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:StatementEquityComponentsAxis=>us-gaap:AdditionalPaidInCapitalMember; 
mntx:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndIssuedInPeriodValue
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Employee incentive plan grant 
-1000 
(1) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-61977000 
$(61,977) 
9/30/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
us-gaap:StatementEquityComponentsAxis=>us-gaap:RetainedEarningsMember; 
us-gaap:StockholdersEquity
Statement - Condensed Consolidated Statement of Shareholders' Equity (Unaudited)
Balance end of year 
-2836000 
$(2,836) 
9/30/2020 - Instant 
instant 
monetaryItemType 
credit 
Period End Label 
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us-gaap:ProfitLoss
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net income (loss) 
-11724000 
$(11,724) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:DeferredIncomeTaxesAndTaxCredits
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Deferred income taxes 
-21000 
(21) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
mntx:ReservesForUncertainTaxProvisions
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Reserves for uncertain tax provisions 
-131000 
(131) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:IncreaseDecreaseInAccountsReceivable
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Increase) decrease in accounts receivable 
-5775000 
5,775 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
us-gaap:IncreaseDecreaseInOtherReceivables
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Increase) decrease in other receivable 
-70000 
70 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
us-gaap:IncreaseDecreaseInInventories
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Increase) decrease in inventory 
-742000 
742 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
us-gaap:IncreaseDecreaseInPrepaidExpense
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Increase) decrease in prepaid expenses 
-536000 
536 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
us-gaap:IncreaseDecreaseInOtherOperatingAssets
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Increase) decrease in other assets 
-1000 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
us-gaap:IncreaseDecreaseInAccountsPayable
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Increase (decrease) in accounts payables and related party payables 
-1764000 
(1,764) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:IncreaseDecreaseInAccruedLiabilities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Increase (decrease) in accrued expenses 
-216000 
(216) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Decrease) in other long-term liabilities 
-515000 
(515) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
(Decrease) in other long-term liabilities 
-176000 
(176) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
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us-gaap:NetCashProvidedByUsedInInvestingActivities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net cash (used in) provided for investing activities 
-717000 
(717) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
Total Label 
 
mntx:ProceedsFromBorrowingsOnWorkingCapitalFacilities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net borrowings on working capital facilities 
-1303000 
(1,303) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
mntx:ProceedsFromBorrowingsOnWorkingCapitalFacilities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net borrowings on working capital facilities 
-136000 
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9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
us-gaap:NetCashProvidedByUsedInFinancingActivities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net cash used in financing activities 
-1940000 
(1,940) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
Total Label 
 
us-gaap:NetCashProvidedByUsedInFinancingActivities
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net cash used in financing activities 
-8429000 
(8,429) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
Total Label 
 
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Net increase in cash and cash equivalents 
-823000 
(823) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
debit 
Total Label 
 
us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
Effect of exchange rate changes on cash 
-1438000 
(1,438) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
 
 
mntx:EffectOfChangeInExchangeRates
Disclosure - Revenue Recognition - Summary of Changes in Customer Deposits (Detail)
Effect of change in exchange rates 
-13000 
13 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Negated Label 
 
mntx:FairValueMeasurementWithUnobservableInputsReconciliationEffectOfExchangeRateChanges
Disclosure - Fair Value Measurements - Summary of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Detail)
Effect of change in exchange rates 
-12000 
(12) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
debit 
 
dei:LegalEntityAxis=>mntx:VallaMember;us-gaap:FairValueByFairValueHierarchyLevelAxis=>us-gaap:FairValueInputsLevel3Member; 
us-gaap:DerivativeGainLossOnDerivativeNet
Disclosure - Derivative Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail)
Gain (loss) recognized in statement of operations 
-236000 
$(236) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:HedgingDesignationAxis=>us-gaap:NondesignatedMember;us-gaap:IncomeStatementLocationAxis=>us-gaap:ForeignCurrencyGainLossMember;us-gaap:DerivativeInstrumentRiskAxis=>us-gaap:InterestRateSwapMember;us-gaap:FinancialInstrumentAxis=>us-gaap:ForwardContractsMember; 
us-gaap:DerivativeGainLossOnDerivativeNet
Disclosure - Derivative Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail)
Gain (loss) recognized in statement of operations 
-236000 
$(236) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
 
us-gaap:HedgingDesignationAxis=>us-gaap:NondesignatedMember;us-gaap:DerivativeInstrumentRiskAxis=>us-gaap:InterestRateSwapMember; 
us-gaap:GoodwillForeignCurrencyTranslationGainLoss
Disclosure - Goodwill and Intangible Assets - Changes in Goodwill (Detail)
Effect of change in exchange rates 
-996000 
(996) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss
Disclosure - Accrued Warranty - Summary of Changes in Product Warranty Liability (Detail)
Foreign currency translation 
-33000 
(33) 
9/30/2021 - 9 Months 
duration 
monetaryItemType 
credit 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
Disclosure - Net Earnings (Loss) per Common Share - Basic and Diluted Net Earnings Per Share (Detail)
Loss from discontinued operations 
-0.01 
$(0.01) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
Disclosure - Net Earnings (Loss) per Common Share - Basic and Diluted Net Earnings Per Share (Detail)
Loss from discontinued operations 
-0.04 
$(0.04) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
Disclosure - Net Earnings (Loss) per Common Share - Basic and Diluted Net Earnings Per Share (Detail)
Loss from discontinued operations 
-0.01 
$(0.01) 
9/30/2020 - 3 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
Disclosure - Net Earnings (Loss) per Common Share - Basic and Diluted Net Earnings Per Share (Detail)
Loss from discontinued operations 
-0.04 
$(0.04) 
9/30/2020 - 9 Months 
duration 
perShareItemType 
none 
 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Disclosure - Discontinued Operations - Summary of Loss from Discontinued Operations (Detail)
Net loss of discontinued operations before income tax 
-120000 
(120) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Disclosure - Discontinued Operations - Summary of Loss from Discontinued Operations (Detail)
Net loss of discontinued operations before income tax 
-831000 
(831) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax
Disclosure - Discontinued Operations - Summary of Loss from Discontinued Operations (Detail)
Net loss on discontinued operations 
-124000 
$(124) 
9/30/2020 - 3 Months 
duration 
monetaryItemType 
credit 
Total Label 
 
us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax
Disclosure - Discontinued Operations - Summary of Loss from Discontinued Operations (Detail)
Net loss on discontinued operations 
-832000 
$(832) 
9/30/2020 - 9 Months 
duration 
monetaryItemType 
credit 
Total Label