Selected Balance Sheet Accounts (Details 3) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accrued expenses and other current liabilities
Compensation and related costs and professional fees	$ 2,065	$ 4,530
Other accrued expenses	7,016	7,849
Amounts due to customers	482	466
Total other accrued expenses and other current liabilities	7,498	8,315
Total accrued expenses and other current liabilities	$ 9,563	$ 12,845