Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 28, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Entity Registrant Name	ANI PHARMACEUTICALS INC
Entity Central Index Key	0001023024
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	ANIP
Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		11,493,438
Class C Special Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,864