Components of Other Current Liabilities and Deferred Revenue and Customer Advances (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of other current liabilities and deferred revenue and customer advances
Accrued legal	$ 2,603	$ 410
Income taxes payable	11	30
Other current liabilities	632	582
Total other current liabilities	3,246	1,022
Deferred revenue	19,139	3,920
Customer advances	0	14
Total deferred revenue and customer advances	$ 19,139	$ 3,934