Revenue Recognition (Details 3)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Revenue Recognition
Product Return Rate, Percentage	1.10%	1.10%

Represents the aggregate product return rate percentage of qualified sales.

No definition available.

Name:	amph_ProductReturnRatePercentage
Namespace Prefix:	amph_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration