Deferred Revenues - Changes in Deferred Revenue Balances (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Deferred Revenue Arrangement [Line Items]
Net deferred revenues, Beginning Balance	$ 4,049,318	$ 7,791,416
Shipments, net		5,968,371
Recognized as revenues during period	(2,760,804)	(7,855,625)
Net deferred revenues, Ending Balance	1,288,514	4,049,318
Classified and reported as:
Current portion of deferred revenues	1,288,514	2,557,464
Deferred revenues, net of current portion		1,491,854
Total deferred revenues	1,288,514	4,049,318
Recognized as a result of a change in accounting estimate		(1,854,844)
Royalty revenue [Member] | NUEDEXTA Product Shipments, Net [Member]
Deferred Revenue Arrangement [Line Items]
Net deferred revenues, Beginning Balance		1,652,788
Shipments, net		5,968,371
Recognized as revenues during period		(5,766,315)
Net deferred revenues, Ending Balance
Classified and reported as:
Current portion of deferred revenues
Deferred revenues, net of current portion
Total deferred revenues
Recognized as a result of a change in accounting estimate		(1,854,844)
Royalty revenue [Member] | Drug Royalty USA Agreement [Member]
Deferred Revenue Arrangement [Line Items]
Net deferred revenues, Beginning Balance	4,049,318	6,138,628
Shipments, net
Recognized as revenues during period	(2,760,804)	(2,089,310)
Net deferred revenues, Ending Balance	1,288,514	4,049,318
Classified and reported as:
Current portion of deferred revenues	1,288,514	2,557,464
Deferred revenues, net of current portion		1,491,854
Total deferred revenues	1,288,514	4,049,318
Recognized as a result of a change in accounting estimate