CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue:
Product revenue	$ 104,441	$ 83,537	$ 60,431
Royalty and other revenue	100		3,117
Total revenue	104,541	83,537	63,548
Operating expenses:
Cost of product revenue	47,117	35,251	28,022
Cost of royalty and other revenue	0	0	0
Research and development	7,355	5,740	5,609
Selling, general and administrative	30,853	24,699	17,154
Contingent consideration - fair value adjustments	3,242	4,083	2,072
Total operating expenses	88,567	69,773	52,857
Income from operations	15,974	13,764	10,691
Investment income	346	136	309
Interest expense	(3,768)	(32)	(50)
Other income (expense)	(860)	(445)	188
Income before income taxes	11,692	13,423	11,138
Income tax provision	11	4,078	2,968
Net income	$ 11,681	$ 9,345	$ 8,170
Earnings per share:
Basic	$ 0.35	$ 0.28	$ 0.25
Diluted	$ 0.34	$ 0.28	$ 0.25
Weighted average shares outstanding:
Basic	33,572,883	32,881,940	32,497,657
Diluted	34,098,898	33,577,091	33,263,667
Other comprehensive income:
Unrealized gain (loss) on investments	$ 6	$ 22	$ (28)
Foreign currency translation loss	(5,189)	(2,815)	(7,743)
Comprehensive income	$ 6,498	$ 6,552	$ 399