CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue:
Product revenue	$ 30,569	$ 25,094
Royalty and other revenue	21
Total revenue	30,590	25,094
Operating expenses:
Cost of product revenue	13,990	11,069
Research and development	1,742	1,539
Selling, general and administrative	9,182	7,018
Contingent consideration - fair value adjustments		2,005
Total operating expenses	24,914	21,631
Income from operations	5,676	3,463
Investment income	96	61
Interest expense	(1,585)	(5)
Other expense	(120)	(979)
Income before income taxes	4,067	2,540
Income tax provision	999	915
Net income	$ 3,068	$ 1,625
Earnings per share:
Basic	$ 0.09	$ 0.05
Diluted	$ 0.09	$ 0.05
Weighted average shares outstanding:
Basic	33,891,702	33,024,681
Diluted	34,382,322	33,493,575
Other comprehensive income:
Unrealized gain on investments	$ 4	$ 15
Foreign currency translation gain	1,027	1,881
Comprehensive income (loss)	$ 4,099	$ 3,521