CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Product sales, net	$ 12,830	$ 15,709	$ 50,978	$ 48,156
Research and development services and other income	21	442	172	790
Total revenues	12,851	16,151	51,150	48,946
Costs and expenses:
Cost of revenues	10,313	8,137	29,641	23,421
Selling, general and administrative expenses	5,971	3,694	14,976	10,813
Product development and research expenses	4,606	4,017	13,387	12,496
Total costs and expenses	20,890	15,848	58,004	46,730
Operating income (loss)	(8,039)	303	(6,854)	2,216
Other Income (Expense):
Foreign currency exchange gain	1,744	364	6,645	1,295
Interest and other expense, net	(2,663)	(3,347)	(8,731)	(9,997)
Loss before income tax expense	(8,958)	(2,680)	(8,940)	(6,486)
Income tax expense	24	23	130	68
Net loss	$ (8,982)	$ (2,703)	$ (9,070)	$ (6,554)
Basic and diluted (loss) per share (in dollars per share)	$ (0.17)	$ (0.05)	$ (0.17)	$ (0.12)
Weighted average shares of common stock outstanding:
Basic and diluted shares (in shares)	53,391,948	53,093,368	53,297,889	53,061,630