Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013 Common stock	Oct. 31, 2013 Class C special stock
Document Information [Line Items]
Entity Registrant Name	ANI PHARMACEUTICALS INC
Entity Central Index Key	0001023024
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Accelerated Filer
Trading Symbol	ANIP
Entity Common Stock, Shares Outstanding		9,480,206	10,868
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3