Selected Balance Sheet Accounts (Details 4) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accrued expenses and other current liabilities
Compensation and related costs and professional fees	$ 2,907	$ 3,981
Other accrued expenses	5,722	5,715
Amounts due to customers	556	486
Other current liabilities	522	562
Total accrued expenses and other current liabilities	$ 9,707	$ 10,744