CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Revenue, net	$ 16,751	$ 18,408	$ 31,296	$ 38,299
Costs and expenses:
Cost of revenues	11,728	10,371	21,053	19,328
Selling, general and administrative expenses	5,961	4,706	11,321	9,005
Product development and research expenses	3,967	5,113	7,358	8,781
Total costs and expenses	21,656	20,190	39,732	37,114
Operating income (loss)	(4,905)	(1,782)	(8,436)	1,185
Other Income (Expense):
Foreign currency exchange (loss) gain	(3,220)	3,822	(1,895)	4,901
Debt partial extinguishment of Convertible 3.75% Senior Notes	(10,069)	0	(10,069)	0
Interest and other expense, net	(2,499)	(2,936)	(5,071)	(6,068)
(Loss) income before income tax expense	(20,693)	(896)	(25,471)	18
Income tax expense	23	23	47	106
Net loss	$ (20,716)	$ (919)	$ (25,518)	$ (88)
Basic and diluted loss per share (in dollars per share)	$ (0.39)	$ (0.02)	$ (0.48)	$ 0.00
Weighted average shares of common stock outstanding:
Basic and diluted shares (in shares)	53,510,712	53,304,407	53,484,756	53,250,109