CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Revenue	$ 60,634	$ 44,830
Costs and operating expenses:
Cost of product revenue	26,845	19,668
Research and development	3,620	3,288
Selling, general and administrative	18,998	15,898
Total costs and operating expenses	49,463	38,854
Income from operations	11,171	5,976
Other income (expenses):
Investment income	713	181
Interest expense	(1,726)	(1,652)
Other income	358	71
Other expenses, net	(655)	(1,400)
Income before income taxes	10,516	4,576
Income tax provision	2,463	1,128
Net income	$ 8,053	$ 3,448
Earnings per share:
Basic	$ 0.18	$ 0.08
Diluted	$ 0.17	$ 0.08
Weighted average common shares outstanding:
Basic	43,968	43,621
Diluted	46,279	44,327
Net income	$ 8,053	$ 3,448
Other comprehensive income (loss):
Foreign currency translation adjustment	(1,891)	251
Comprehensive income	6,162	3,699
Products
Revenue:
Revenue	60,612	44,799
Royalty and Other Revenue
Revenue:
Revenue	$ 22	$ 31