Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 52,072	$ 82,401
Marketable investment securities	66,651	79,832
Accounts receivable	28,074	29,532
Prepaid expenses	3,861	6,174
Other current assets	820	1,689
Total current assets	151,478	199,628
Property and equipment, net	4,097	4,346
Goodwill	9,429	9,429
Debt issuance costs, net	462	577
Total assets	165,466	213,980
Current Liabilities
Accounts payable and accrued expenses	22,586	24,336
Current portion of non-recourse debt	6,981	19,267
Total current liabilities	29,567	43,603
Convertible notes payable	16,545	16,545
Non-recourse debt, less current portion	159,400	192,085
Other liabilities	6,695	7,863
Total liabilities	212,207	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 86,421,589 shares and 86,081,167 shares, respectively	86	86
Additional paid-in capital	950,126	944,344
Accumulated other comprehensive income (loss)	29	(96)
Accumulated deficit	(996,982)	(990,450)
Total stockholders' deficit	(46,741)	(46,116)
Total liabilities and stockholders' deficit	$ 165,466	$ 213,980