Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 55,259,073	$ 69,778,406
Restricted cash and cash equivalents	965,986	652,913
Trade receivables, net	12,525,992	7,231,759
Inventories, net	710,179	415,475
Prepaid expenses	1,391,210	1,569,255
Other current assets	991,200	865,335
Restricted short-term investments		401,550
Total current assets	71,843,640	80,914,693
Restricted long-term investments	1,303,938	1,302,136
Property and equipment, net	1,592,791	1,808,594
Non-current inventories, net	784,186	908,364
Other assets	554,452	1,078,009
Total assets	76,079,007	86,011,796
Current liabilities:
Accounts payable	5,876,425	2,932,961
Accrued expenses	11,908,570	7,062,159
Accrued compensation and payroll taxes	7,775,761	5,603,546
Current portion of deferred royalty revenues	1,288,514	2,557,464
Current portion of notes payable, net of debt discount	7,942,945	2,162,263
Total current liabilities	34,792,215	20,318,393
Other liabilities	1,393,075	666,179
Notes payable, net of current portion and debt discount	21,422,163	26,698,263
Deferred royalty revenues, net of current portion		1,491,854
Total liabilities	57,607,453	49,174,689
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.0001 par value, 10,000,000 shares authorized, no shares issued
Common stock - $0.0001 par value, 200,000,000 shares authorized; 152,063,621 and 136,435,492 shares issued and outstanding as of September 30, 2013 and 2012, respectively	15,206	13,643
Additional paid-in capital	518,992,237	461,883,490
Accumulated deficit	(500,535,889)	(425,060,026)
Total stockholders' equity	18,471,554	36,837,107
Total liabilities and stockholders' equity	$ 76,079,007	$ 86,011,796