Revenue Recognition - Returns Reserve - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Sales return reserve	$ 0.6	$ 0.0

Revenue recognition sales returns reserve for sales return.

No definition available.

Name:	abmd_RevenueRecognitionSalesReturnsReserveForSalesReturn
Namespace Prefix:	abmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant