Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 14,578	$ 2,435
Inventory	166	179
Prepaid expenses and other current assets	374	333
Total current assets	15,118	2,947
Restricted cash	70	189
Property and equipment, net	162	222
Long-term inventory	504	825
Deferred financing costs	993	506
Total assets	16,847	4,689
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable	1,627	1,244
Accrued research contract costs	843	859
Other accrued liabilities	1,717	1,286
Notes and loans payable, current portion	2,063	524
Deferred revenue, current portion	908	921
Total current liabilities	7,158	4,834
Notes and loans payable	6,141	62
7.5556% Convertible Subordinated Notes Due 2014	0	386
Deferred revenue	12,472	12,905
Deferred rent and other noncurrent liabilities	801	637
Total liabilities	26,572	18,824
Commitments and contingencies
Common stock, $.0001 par value; authorized 225,000,000 shares; issued 71,007,834 and 54,991,535 shares at June 30, 2011 and December 31, 2010, respectively	7	5
Additional paid-in capital	218,525	210,540
Warrants	31,156	27,227
Accumulated deficit	(257,390)	(250,582)
Accumulated other comprehensive loss	(1,948)	(1,250)
Treasury stock, at cost (4,167 shares)	(75)	(75)
Total stockholders' deficit	(9,725)	(14,135)
Total liabilities and stockholders' deficit	$ 16,847	$ 4,689