Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net loss	$ (75,475,863)	$ (59,743,827)	$ (60,631,563)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	826,482	699,738	437,845
Allowance for doubtful accounts	207,828
Amortization of debt discount and debt issuance costs	596,096	213,319
Share-based compensation expense	5,845,793	4,877,482	3,778,453
Loss on disposal of assets	279		9,271
Changes in operating assets and liabilities:
Trade receivables, net	(5,502,061)	(5,220,594)	(2,011,165)
Inventories, net	(170,526)	(278,662)	(164,342)
Prepaid expenses and other assets	484,223	(208,909)	(2,245,098)
Accounts payable	2,888,227	(327,627)	1,285,100
Accrued expenses and other liabilities	5,465,884	4,722,878	1,601,130
Accrued compensation and payroll taxes	2,172,215	1,351,680	2,104,495
Deferred product revenues, net		(1,652,788)	1,652,788
Deferred royalty revenues	(2,760,804)	(2,089,310)	(2,338,203)
Net cash used in operating activities	(65,422,227)	(57,656,620)	(56,521,289)
Cash flows from investing activities:
Purchases of property and equipment	(448,298)	(813,003)	(1,823,355)
Purchases of restricted investments and restricted cash and cash equivalents	(314,875)	(103,660)	(1,651,389)
Proceeds from maturities of restricted short-term investments	401,550
Net cash used in investing activities	(361,623)	(916,663)	(3,474,744)
Cash flows from financing activities:
Proceeds from debt, net of issuance costs		29,614,564
Proceeds from issuances of common stock, net of commissions and offering costs	48,752,806	10,062,996	90,851,876
Proceeds from exercise of stock options and warrants	2,511,711	9,131,565	9,340,007
Collection of stock subscriptions receivable			580,910
Shares surrendered to pay for tax withholding			(5,665)
Net cash provided by financing activities	51,264,517	48,809,125	100,767,128
Net change in cash and cash equivalents	(14,519,333)	(9,764,158)	40,771,095
Cash and cash equivalents at beginning of year	69,778,406	79,542,564	38,771,469
Cash and cash equivalents at end of year	55,259,073	69,778,406	79,542,564
Supplemental disclosures of cash flow information:
Interest paid	2,685,000	648,875
Income taxes paid	3,200	3,200	3,200
Supplemental disclosures of non-cash investing and financing activities:
Purchases of property and equipment in accounts payable and accrued expenses	162,660
Issuance of warrants for common stock in connection with notes payable		$ 1,169,227