Balance Sheet Components (Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Accrued Liabilities [Abstract]
Accrued compensation	$ 7,251	$ 5,485
Accrued marketing expenses	5,260	19,072
Accrued production costs	5,143	16,939
Accrued income and sales taxes	4,261	11,106
Accrued consulting	1,443	1,861
Accrued other	7,243	4,808
Total accrued liabilities	$ 30,601	$ 59,271