Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 30,684	$ 82,401
Marketable investment securities	79,684	79,832
Accounts receivable	56,700	29,532
Prepaid expenses	4,685	6,174
Other current assets	1,058	1,689
Total current assets	172,811	199,628
Property and equipment, net	4,188	4,346
Goodwill	9,429	9,429
Debt issuance costs, net	495	577
Total assets	186,923	213,980
Current Liabilities
Accounts payable and accrued expenses	34,763	24,336
Current portion of non-recourse debt	7,765	19,267
Total current liabilities	42,528	43,603
Convertible notes payable	16,545	16,545
Non-recourse debt, less current portion	166,340	192,085
Other liabilities	6,768	7,863
Total liabilities	232,181	260,096
Commitments and contingencies (notes 6 and 8)
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; issued and outstanding 86,345,416 shares and 86,081,167 shares, respectively	86	86
Additional paid-in capital	948,312	944,344
Accumulated other comprehensive loss	2	(96)
Accumulated deficit	(993,658)	(990,450)
Total stockholders' deficit	(45,258)	(46,116)
Total liabilities and stockholders' deficit	$ 186,923	$ 213,980