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

X
- Definition Represents the aggregate product return rate percentage of qualified sales. + References No definition available. + Details
Name: | amph_ProductReturnRatePercentage
Namespace Prefix: | amph_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueRecognitionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration