Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 137,658	$ 77,170
Marketable investment securities	64,708	56,601
Restricted cash and cash equivalents	0	50,784
Accounts receivable	30,420	26,721
Prepaid expenses	6,263	4,115
Other current assets	1,064	504
Total current assets	240,113	215,895
Equipment, net	2,123	1,142
Goodwill	9,429	9,429
Debt issuance costs, net	1,380	2,143
Other assets	227	296
Total assets	253,272	228,905
Current Liabilities
Accounts payable and accrued expenses	21,404	26,302
Current portion of non-recourse debt	17,175	55,843
Total current liabilities	38,579	82,145
Convertible notes payable	16,545	50,000
Non-recourse debt, less current portion	218,662	244,256
Other liabilities	6,803	7,779
Total liabilities	280,589	384,180
Commitments and contingencies (notes 6, 8 and 9)
Stockholders' deficit
Preferred stock, $0.001 par value. Authorized 5,000,000 shares; issued and outstanding no shares	0	0
Common stock, $0.001 par value. Authorized 175,000,000 shares and 105,000,000 shares; issued and outstanding 86,037,694 shares and 66,986,940 shares, respectively	86	67
Additional paid-in capital	942,036	798,840
Accumulated other comprehensive income	26	1
Accumulated deficit	(969,465)	(954,183)
Total stockholders' deficit	(27,317)	(155,275)
Total liabilities and stockholders' deficit	$ 253,272	$ 228,905