Accrued Expenses and Other Liabilities (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Schedule of accrued expenses and other liabilities
Accrued royalties, rebates, chargebacks, and distribution fees	$ 4,109,675	$ 2,851,140
Accrued research and development expenses	1,559,159	1,222,140
Accrued selling and marketing expenses	801,066	1,075,387
Accrued general and administrative expenses	780,358	1,094,755
Other liabilities	1,769,277	1,484,916
Total accrued expenses and other liabilities	9,019,535	7,728,338
Less: current portion	(7,946,270)	(7,062,159)
Non-current total accrued expenses and other liabilities	$ 1,073,265	$ 666,179