Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2013	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 67,859,426	$ 69,778,406
Restricted cash and cash equivalents	654,624	652,913
Trade receivables, net	9,679,775	7,231,759
Inventories, net	428,969	415,475
Prepaid expenses	1,763,941	1,569,255
Other current assets	806,133	865,335
Restricted short-term investment		401,550
Total current assets	81,192,868	80,914,693
Restricted long-term investments	1,303,938	1,302,136
Property and equipment, net	1,680,317	1,808,594
Non-current inventories, net	908,366	908,364
Other assets	625,196	1,078,009
TOTAL ASSETS	85,710,685	86,011,796
Current liabilities:
Accounts payable	7,557,046	2,932,961
Accrued expenses and other liabilities	7,946,270	7,062,159
Accrued compensation and payroll taxes	5,231,342	5,603,546
Current portion of deferred royalty revenues	2,557,464	2,557,464
Current portion of note payable, net of debt discount	7,812,014	2,162,263
Total current liabilities	31,104,136	20,318,393
Accrued expenses and other liabilities, net of current portion	1,073,265	666,179
Notes payable, net of current portion and debt discount	21,325,055	26,698,263
Deferred royalty revenues, net of current portion	117,022	1,491,854
Total liabilities	53,619,478	49,174,689
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.0001 par value, 10,000,000 shares authorized, no shares issued or outstanding as of March 31, 2013 and September 30, 2012
Common stock - $0.0001 par value, 200,000,000 shares authorized; 145,103,001 and 136,435,492 shares issued and outstanding as of March 31, 2013 and September 30, 2012, respectively	14,510	13,643
Additional paid-in capital	485,739,506	461,883,490
Accumulated deficit	(453,662,809)	(425,060,026)
Total stockholders' equity	32,091,207	36,837,107
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 85,710,685	$ 86,011,796