Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 51,036	$ 5,514
Short-term investments	15,796	23,363
Government grant receivable		489
Prepaid expenses	566	583
Other current assets	209	131
Total current assets	67,607	30,080
Property and equipment, net	1,788	1,958
Other assets	287	290
Goodwill	2,117	2,117
Total assets	71,799	34,445
Current liabilities
Accounts payable	639	624
Accrued liabilities	1,102	533
Accrued compensation and related liabilities	583	686
Current portion of notes payable	1,132
Current portion of deferred revenue		18
Total current liabilities	3,456	1,861
Notes payable	3,785	199
Noncurrent portion of deferred revenue		127
Deferred rent	412	388
Warrant liability	42,464	12,983
Class UA preferred stock, 12,500 shares authorized, issued and outstanding	30	30
Contingencies, commitments, and guarantees
Stockholders’ equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.0001 par value; 100,000,000 shares authorized, 41,641,393 and 30,088,628 shares issued and outstanding	353,851	353,850
Additional paid-in capital	61,301	17,328
Accumulated deficit	(388,344)	(347,255)
Accumulated other comprehensive loss	(5,156)	(5,066)
Total stockholders’ equity	21,652	18,857
Total liabilities and stockholders’ equity	$ 71,799	$ 34,445