Deferred Solution and Other Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred solution costs	$ 6,295	$ 4,039
Deferred commissions	2,544	1,929
Deferred solution and other costs, current portion	8,839	5,968
Deferred solution costs	4,741	3,325
Deferred commissions	6,384	6,821
Deferred solution and other costs, net of current portion	$ 11,125	$ 10,146