Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 10,189	$ 10,211
Prepaid expenses and other current assets	442	285
Total current assets	10,631	10,496
Property and equipment, net	2,293	3,467
Restricted cash	400	400
Other assets	0	174
Total assets	13,324	14,537
Current Liabilities:
Accounts payable	1,111	1,685
Accrued expenses	2,972	3,286
Common stock warrant liability	6,996	2,469
Equipment loans and capitalized leases, current portion	68	136
Total current liabilities	11,147	7,576
Equipment loans and capitalized leases, non-current portion	224	301
Other liabilities	689	634
Total liabilities	12,060	8,511
Stockholders' Equity:
Preferred stock, $0.001 par value; 5,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value; 100,000 and 50,000 authorized; 24,603 and 13,822 shares issued, 24,582 and 13,801 shares outstanding	25	14
Additional paid-in capital	401,713	385,521
Accumulated deficit	(397,420)	(376,455)
Treasury stock (at cost); 21 shares	(3,054)	(3,054)
Total stockholders' equity	1,264	6,026
Total liabilities & stockholders' equity	$ 13,324	$ 14,537