Selected Balance Sheet Accounts (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued expenses and other current liabilities
Compensation and related costs and professional fees	$ 3,981	$ 5,149
Other accrued expenses	5,715	3,383
Amounts due to customers	486	267
Other current liabilities	562	696
Total accrued expenses and other current liabilities	$ 10,744	$ 9,495