Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 22,945	$ 40,302
Marketable securities	64,293	48,206
Accounts receivable, net	7,208
Interest receivable	982	664
Inventories	5,188	1,152
Prepaid expenses and other	1,815	994
Deferred financing costs, current	431	144
Total current assets	102,862	91,462
Property and equipment, net	2,480	1,421
Intangible assets, net	817	683
Long term investments	15,215
Other assets	360	334
Deferred financing costs, long-term	2,031	89
Total assets	123,765	93,989
Current liabilities:
Accounts payable and accrued expenses	14,472	10,666
Deferred product revenue, net	10,365
Deferred licensing revenue	234	508
Secured notes payable, net of discount		11,809
Total current liabilities	25,071	22,983
Deferred licensing revenue, net of current portion	1,452	309
Convertible notes, net of discount	60,175
Secured notes payable, net of current portion and discount		11,088
Other non-current liabilities	2,401	1,788
Derivative liabilities	22,213	251
Total liabilities	111,312	36,419
Stockholders' equity:
Common Stock, Value, Issued	31	31
Additional paid-in capital	168,625	143,851
Accumulated other comprehensive loss	(81)	(57)
Accumulated deficit	(156,122)	(86,255)
Total stockholders' equity	12,453	57,570
Total liabilities and stockholders' equity	$ 123,765	$ 93,989