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Share Based Compensation (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended 70 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 150,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized 150,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized    
Percentage of Option Lost Value Allocated To Parent Company Options 80.00%hart_PercentageOfOptionLostValueAllocatedToParentCompanyOptions      
Percentage of Option Lost Value Allocated To Stock Options 20.00%hart_PercentageOfOptionLostValueAllocatedToStockOptions      
Non-Qualified Stock Option [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   2,224,604us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hart_NonqualifiedStockOptionMember		    
Incentive Stock Options [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   130,122us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= hart_IncentiveStockOptionsMember		    
Harvard Bioscience Inc [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number of Shares, Period Increase (Decrease)     298,784us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNumberOfSharesPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= hart_HarvardBioscienceIncMember		  
Harvard Bioscience Inc [Member] | Restricted Stock Units (RSUs) [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     20,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hart_HarvardBioscienceIncMember		  
Employee Stock Option [Member] | Harvard Bioscience Inc [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ dei_LegalEntityAxis
= hart_HarvardBioscienceIncMember
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember		      
Harvard Bioscience Plan [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     2.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		  
Closing Price of Stock 5.67hart_ClosingPriceOfStock
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 5.67hart_ClosingPriceOfStock
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 0.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		   1.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,697,109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 1,697,109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total 0.6us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 0.6us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 5 months 26 days      
Harvard Bioscience Plan [Member] | Restricted Stock Units (RSUs) [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance 171,557us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 171,557us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 326,185us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 184,264us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		   63,929us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		  
Harvard Bioscience Plan [Member] | Employee Stock Option [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		   217,902us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance 2,122,648us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 2,122,648us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 2,500,339us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 622,340us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number of Shares, Period Increase (Decrease)     2,177,100us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNumberOfSharesPeriodIncreaseDecrease
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= hart_HarvardBiosciencePlanMember		 [1]  
Equity Incentive Plan 2013 [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value 5.25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		   3.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 3,320,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 3,320,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 237,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		   2,117,226us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		  
Common Stock, Capital Shares Reserved for Future Issuance 3,320,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 3,320,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance 2,006,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 2,006,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 2,075,707us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member
Closing Price of Stock 3.18hart_ClosingPriceOfStock
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 3.18hart_ClosingPriceOfStock
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 507,466.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		   810.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 12,905us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 12,905us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total 4.4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 4.4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 2 months 1 day      
Equity Incentive Plan 2013 [Member] | Restricted Stock Units (RSUs) [Member]        
Stock Based Compensation [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance 7,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 7,980us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 19,492us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= hart_EquityIncentivePlan2013Member		   23,715us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
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= hart_EquityIncentivePlan2013Member		  
[1] Prior to the Separation, this rollforward included only those Harvard Bioscience options and restricted stock units which were issued while giving service to the regenerative technology operations of Harvard Bioscience. If employees were splitting time between regenerative technology and other parts of Harvard Bioscience, only an allocated portion of that year’s activity would be reflected. As of the time of the Separation, the rollfoward was “Adjusted” to exclude all Harvard Bioscience employees not employed by HART at the time of the Separation, and to include 100% of the Harvard Bioscience awards held by HART employees (regardless of level of service in prior years).