CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 25,299	$ 25,228
Restricted cash	318	318
Accounts receivable	158	2,158
Other assets	1,090	1,513
Total current assets	26,865	29,217
Property and equipment, net	22	26
Other noncurrent assets	158	162
Total assets	27,045	29,405
Current liabilities
Accounts payable	858	587
Accrued payroll and benefits	199	235
Accrued expense	2,227	2,650
Total current liabilities	3,284	3,472
Other long-term liabilities	1,552	1,575
Total noncurrent liabilities	1,552	1,575
Equity
Preferred stock, par value $0.001, authorized 10,000,000 shares; no shares issued and outstanding at March 31, 2016 and December 31, 2015	0	0
Common stock, par value $0.001, authorized 600,000,000 shares; 17,675,220 shares issued and outstanding at March 31, 2016 and December 31, 2015	18	18
Additional paid-in capital	390,557	390,557
Accumulated deficit	(367,102)	(364,953)
Accumulated other comprehensive loss	(1,264)	(1,264)
Total equity	22,209	24,358
Total liabilities and equity	$ 27,045	$ 29,405