CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Revenue	$ 76,090	$ 60,634
Costs and operating expenses:
Cost of product revenue	31,982	26,845
Research and development	4,702	3,620
Selling, general and administrative	27,500	18,998
Total costs and operating expenses	64,184	49,463
Income from operations	11,906	11,171
Other income (expenses):
Investment income	1,364	713
Interest expense	(2,976)	(1,726)
Other income	382	358
Other expenses, net	(1,230)	(655)
Income before income taxes	10,676	10,516
Income tax provision	861	2,463
Net income	$ 9,815	$ 8,053
Earnings per share:
Basic	$ 0.19	$ 0.18
Diluted	$ 0.18	$ 0.17
Weighted average common shares outstanding:
Basic	52,139	43,968
Diluted	53,109	46,279
Net income	$ 9,815	$ 8,053
Other comprehensive income (loss):
Foreign currency translation adjustment	(5,579)	(1,891)
Comprehensive income	4,236	6,162
Products
Revenue:
Revenue	76,060	60,612
Royalty and Other Revenue
Revenue:
Revenue	$ 30	$ 22