Components of Other Current Liabilities and Deferred Revenue and Customer Advances (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Other Current Liabilities and Deferred Revenue and Customer Advances
Accrued legal	$ 1,838	$ 727
Income taxes payable	149	23
Other current liabilities	491	1,304
Total other current liabilities	2,478	2,054
Deferred revenue	4,635	4,046
Customer advances	16	74
Total deferred revenue and customer advances	$ 4,651	$ 4,120