Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 46,267	$ 17,471
Marketable investment securities	131,334	83,244
Accounts receivable	31,986	30,276
Inventory	27,580	0
Prepaid expenses	4,211	4,317
Other current assets	2,235	1,743
Total current assets	243,613	137,051
Property and equipment, net	3,860	4,193
Goodwill	9,429	9,429
Intangibles, net	19,750	0
Debt issuance costs, net	361	436
Total assets	277,013	151,109
Current Liabilities
Accounts payable and accrued expenses	24,207	23,289
Convertible notes payable	16,545	0
Current portion of non-recourse debt	6,670	6,278
Total current liabilities	47,422	29,567
Convertible notes payable	0	16,545
Non-recourse debt, less current portion	132,387	153,024
Other liabilities	5,372	6,614
Total liabilities	185,181	205,750
Commitments and contingencies (notes 6 and 8)
Stockholders' equity (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 102,087,311 shares and 86,799,049 shares, respectively	102	87
Additional paid-in capital	1,122,168	954,452
Accumulated other comprehensive income	19	5
Accumulated deficit	(1,030,457)	(1,009,185)
Total stockholders' equity (deficit)	91,832	(54,641)
Total liabilities and stockholders' equity (deficit)	$ 277,013	$ 151,109