Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 54,188	$ 33,589
Accounts receivable	10,892	3,224
Other current assets	943	1,025
Total Current Assets	66,023	37,838
Property held for sale	1,965	1,965
Property and Equipment, net of accumulated depreciation and amortization of $15,338 and $14,963	2,363	2,070
Patent Costs, net of accumulated amortization of $1,845 and $1,742	4,459	3,980
Other assets	123	123
Total Assets	74,933	45,976
Liabilities and Shareholders' Equity (Deficit)
Accounts payable	10,975	1,311
Accrued employee compensation	2,551	2,015
Long-term debt, current portion	83	81
Warrant valuation	19,940	39,111
Deferred revenue	3,304	3,304
Other liabilities	85	35
Total Current Liabilities	36,938	45,857
Commitments and Contingencies
Long-term debt, non-current portion	1,800	1,842
Other long-term liabilities	1,046	1,094
Shareholders' Equity (Deficit):
Preferred stock, $.0001 par value, 20,000,000 shares authorized; none issued and outstanding
Common stock, $.0001 par value, 300,000,000 and 200,000,000 shares authorized; 135,685,068 and 112,352,452 issued and outstanding	14	11
Additional paid-in capital	339,669	304,818
Deficit accumulated during the development stage	(304,534)	(307,646)
Total Shareholders' Equity (Deficit)	35,149	(2,817)
Total Liabilities and Shareholders' Equity (Deficit)	$ 74,933	$ 45,976