Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	[1]
Current assets:
Cash and cash equivalents	$ 4,502	$ 7,755
Receivables	8	0
Prepaid expenses and other current assets	2,933	3,237
Total current assets	7,443	10,992
Property and equipment, net	2,749	3,320
Other assets	391	419
Total assets	10,583	14,731
Current liabilities:
Accounts payable	851	442
Accrued clinical trial liabilities	179	178
Other accrued liabilities	8,133	6,990
Current portion of contingent consideration liability	1,100	900
Financing obligations, net of $1,047 and $5,034 debt discounts as of March 31, 2016 and December 31, 2015, respectively	47,953	46,840
Current portion of deferred revenues	2,136	2,848
Total current liabilities	60,352	58,198
Deferred rent	3,066	3,412
Noncurrent portion of contingent consideration liability	1,500	1,900
Noncurrent portion of financing obligations	20,000	21,127
Other noncurrent liabilities	0	1,752
Stockholders’ (deficit):
Preferred stock	0	0
Common Stock	2	2
Additional paid-in capital	361,295	360,610
Accumulated other comprehensive (loss) income	0	0
Accumulated deficit	(435,632)	(432,270)
Total stockholders’ deficit	(74,335)	(71,658)
Total liabilities and stockholders’ deficit	$ 10,583	$ 14,731

[1] The condensed consolidated balance sheet at December 31, 2015 has been derived from audited consolidated financial statements at that date.