Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accrued Expenses and Other Current Liabilities
Professional fees	$ 1,115	$ 1,325
Consulting fees/provider fees	2,816	4,028
Client performance guarantees	3,098	2,617
Legal fees	1,031	759
Interest payable	2,429	367
Lease abandonment obligation - current	829
Marketing	643	524
Earnout and compensation		722
Printing and postage		302
Deferred revenue	4,703	4,111
Other	4,834	4,602
Total	$ 21,498	$ 19,357