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Consolidated Statements of Shareholders' Equity (USD $) | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital Common Stock [Member] | Additional Paid-in Capital Warrants [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings (Accumulated Deficit) [Member] | Total
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Balance at Mar. 31, 2012 | $ 125,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (89,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 98,627,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 1,879,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | $ (884,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (26,039,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 73,619,000 us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2012 | 12,533,821 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (14,400)us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Compensation recognized under employee stock plans | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 752,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 752,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares) | 52,530 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |
Common stock issued under stock plans, net of shares withheld for employee taxes | 1,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 241,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 242,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
Repurchase of options granted |  |  | (455,000)mpaa_AdjustmentsToAdditionalPaidInCapitalRepurchaseOfOptionsGranted / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (455,000)mpaa_AdjustmentsToAdditionalPaidInCapitalRepurchaseOfOptionsGranted
Tax benefit from employee stock options exercised | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 101,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 101,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Expired unexercised warrants |  |  | 1,879,000 mpaa_AdjustmentsToAdditionalPaidInCapitalExpiredUnexercisedWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (1,879,000)mpaa_AdjustmentsToAdditionalPaidInCapitalExpiredUnexercisedWarrants / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember |  |  | 0 mpaa_AdjustmentsToAdditionalPaidInCapitalExpiredUnexercisedWarrants
Repurchase of common stock including fees (in shares) |  | (52,947)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Repurchase of common stock including fees |  | (300,000)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  | (300,000)us-gaap_TreasuryStockValueAcquiredCostMethod
Cancellation of treasury stock (in shares) | (67,347)us-gaap_TreasuryStockSharesRetired / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 67,347 us-gaap_TreasuryStockSharesRetired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Cancellation of treasury stock | (1,000)us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 389,000 us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (388,000)us-gaap_TreasuryStockRetiredCostMethodAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 0 us-gaap_TreasuryStockRetiredCostMethodAmount
Common stock issued in connection with PIPE (in shares) | 1,936,000 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Common stock issued in connection with PIPE | 20,000 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 14,985,000 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 15,005,000 us-gaap_StockIssuedDuringPeriodValueOther
Stock issuance costs | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (1,034,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember |  |  | (1,034,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
Common stock issued in lieu of cash for PIPE liquidated damages (in shares) | 5,975 mpaa_StockIssuedDuringPeriodSharesPipeLiquidatedDamages / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 mpaa_StockIssuedDuringPeriodSharesPipeLiquidatedDamages / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Common stock issued in lieu of cash for PIPE liquidated damages | 0 mpaa_StockIssuedDuringPeriodValuePipeLiquidatedDamages / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 mpaa_StockIssuedDuringPeriodValuePipeLiquidatedDamages / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 29,000 mpaa_StockIssuedDuringPeriodValuePipeLiquidatedDamages / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 29,000 mpaa_StockIssuedDuringPeriodValuePipeLiquidatedDamages
Unrealized gain on investments, net of tax | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 162,000 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 162,000 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Foreign currency translation | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | (124,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (124,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Net income (loss) | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (91,511,000)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (91,511,000)us-gaap_NetIncomeLoss
Balance at Mar. 31, 2013 | 145,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 114,737,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | (846,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (117,550,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (3,514,000)us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2013 | 14,460,979 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Compensation recognized under employee stock plans | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 969,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 969,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares) | 606,666 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |
Common stock issued under stock plans, net of shares withheld for employee taxes | 6,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 5,760,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 5,766,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
Repurchase of options granted |  |  | (627,000)mpaa_AdjustmentsToAdditionalPaidInCapitalRepurchaseOfOptionsGranted / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (627,000)mpaa_AdjustmentsToAdditionalPaidInCapitalRepurchaseOfOptionsGranted
Tax benefit from employee stock options exercised | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (286,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (286,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Unrealized gain on investments, net of tax | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 34,000 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 34,000 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Foreign currency translation | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | (65,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (65,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Net income (loss) | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 107,359,000 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 107,359,000 us-gaap_NetIncomeLoss
Balance at Mar. 31, 2014 | 151,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 120,553,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | (877,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (10,191,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 109,636,000 us-gaap_StockholdersEquity
Balance (in shares) at Mar. 31, 2014 | 15,067,645 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Compensation recognized under employee stock plans | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 2,210,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 2,210,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Common stock issued under stock plans, net of shares withheld for employee taxes (in shares) | 123,734 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |
Common stock issued under stock plans, net of shares withheld for employee taxes | 1,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 1,246,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 1,247,000 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
Issuance of common stock upon vesting of RSU's, net of shares withheld for employee taxes (in shares) | 23,219 us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |
Issuance of common stock upon vesting of RSU's, net of shares withheld for employee taxes | 0 us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | (806,000)us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (806,000)us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings
Tax benefit from employee stock options exercised | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 1,131,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,131,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Common stock issued in connection with public offering (in shares) | 2,760,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  |
Common stock issued in connection with public offering | 28,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 71,732,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 71,760,000 us-gaap_StockIssuedDuringPeriodValueNewIssues
Stock issuance costs | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (4,787,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember |  |  | (4,787,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
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Foreign currency translation | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = mpaa_AdditionalPaidInCapitalWarrantsMember | (1,665,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 0 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (1,665,000)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
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