CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of net revenue:
License fees	$ 28,919	$ 27,846	$ 28,422
Service revenue	49,799	53,633	64,026
Net revenue	78,718	81,479	92,448	[1]
Components of cost of revenue:
License fees	6,663	6,062	6,381
Service revenue	16,501	21,486	33,139
Cost of revenue	$ 23,164	$ 27,548	$ 39,520	[2]

[1] December 31, 2017 December 31, 2016 December 31, 2015Components of Revenue License Fees28,919 27,846 28,422Service Revenue49,799 53,633 64,026Net Revenue78,718 81,479 92,448

[2] December 31, 2017 December 31, 2016 December 31, 2015Components of Cost of Revenue License Fees6,663 6,062 6,381Service Revenue16,501 21,486 33,139Net Revenue Costs23,164 27,548 39,520