CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Product sales, net	$ 18,295	$ 17,025	$ 38,148	$ 32,447
Research and development services and other income	113	113	151	348
Total revenues	18,408	17,138	38,299	32,795
Costs and Expenses:
Cost of revenues	10,371	7,582	19,328	15,284
Selling, general and administrative expenses	4,706	3,712	9,005	7,119
Product development and research expenses	5,113	4,768	8,781	8,479
Total costs and expenses	20,190	16,062	37,114	30,882
Operating income (loss)	(1,782)	1,076	1,185	1,913
Other Income (Expense):
Foreign currency exchange gain (loss)	3,822	(622)	4,901	931
Interest and other expense, net	(2,936)	(3,332)	(6,068)	(6,650)
(Loss) Income before income tax expense	(896)	(2,878)	18	(3,806)
Income tax expense	23	23	106	45
Net loss	$ (919)	$ (2,901)	$ (88)	$ (3,851)
Basic and diluted (loss) per share (in dollars per share)	$ (0.02)	$ (0.05)	$ 0.00	$ (0.07)
Weighted average shares of common stock outstanding:
Basic and diluted shares (in shares)	53,304,407	53,059,799	53,250,109	53,045,576