Name:	amph_BusinessAcquisitionPaymentAtClosing
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The payment of the purchase price in year four. Value is adjusted from original contractual amount to give effect to foreign exchange changes.

No definition available.

Name:	amph_BusinessAcquisitionPaymentYearFour
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The payment of the purchase price in year one, excluding the payment made at closing. Value is adjusted from original contractual amount to give effect to foreign exchange changes.

No definition available.

Name:	amph_BusinessAcquisitionPaymentYearOne
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The payment of the purchase price in year three. Value is adjusted from original contractual amount to give effect to foreign exchange changes.

No definition available.

Name:	amph_BusinessAcquisitionPaymentYearThree
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The payment of the purchase price in year two. Value is adjusted from original contractual amount to give effect to foreign exchange changes.

No definition available.

Name:	amph_BusinessAcquisitionPaymentYearTwo
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The estimated total payments for an acquisition. Value is adjusted from original contractual amount to give effect to foreign exchange changes.

No definition available.

Name:	amph_BusinessAcquisitionTotalEstimatedPayments
Namespace Prefix:	amph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477