CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Product sales, net	$ 65,904	$ 43,497	$ 32,104
Research and development services and other income	977	753	1,636
Total revenues	66,881	44,250	33,740
Costs and Expenses:
Cost of revenues	32,194	22,935	16,948
Selling, general and administrative expenses	15,005	11,336	5,976
Product development and research expenses	17,140	13,171	6,910
Total costs and expenses	64,339	47,442	29,834
Operating income (loss)	2,542	(3,192)	3,906
Other Income (Expense):
Change in the fair value of derivative liability	0	23,144	2,300
Foreign currency exchange gain (loss)	(936)	109	0
Interest and other expense, net	(13,304)	(13,358)	(782)
Income (loss) before income tax expense (benefit)	(11,698)	6,703	5,424
Income tax expense	287	35	173
Net income (loss) income attributable to common stockholders	$ (11,985)	$ 6,668	$ 5,251
Basic earnings (loss) per share (in dollars per share)	$ (0.23)	$ 0.13	$ 0.11
Diluted earnings (loss) per share (in dollars per share)	$ (0.23)	$ (0.07)	$ 0.09
Weighted average shares of common stock outstanding:
Basic (in shares)	53,078,158	52,872,814	49,817,721
Diluted (in shares)	53,078,158	67,111,995	64,207,190