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Estimated Fair Values of the Assets Acquired and Liabilities Assumed (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Jul. 01, 2014
Acquired assets:        
Goodwill $ 31,534us-gaap_Goodwill $ 37,990us-gaap_Goodwill $ 35,410us-gaap_Goodwill  
Long-term deferred tax assets 45,206us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent      
ECP        
Acquired assets:        
Cash and cash equivalents       53us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Accounts receivable       25us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Property and equipment       619us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
In-process research and development       18,500us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Goodwill       1,964us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Long-term deferred tax assets       1,874us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Other assets acquired       141us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Total assets acquired       23,176us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Liabilities assumed:        
Accounts payable       295us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Accrued liabilities       131abmd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Long-term deferred tax liabilities       1,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Total liabilities assumed       1,426us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember
Net assets acquired       $ 21,750us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= abmd_EcpMember