CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Revenue	$ 94,060	$ 69,445	$ 257,612	$ 200,771
Costs and operating expenses:
Cost of product revenue	39,626	31,425	108,471	88,978
Research and development	4,422	5,427	13,460	14,278
Selling, general and administrative	29,051	24,629	83,277	67,326
Total costs and operating expenses	73,099	61,481	205,208	170,582
Income from operations	20,961	7,964	52,404	30,189
Other income (expenses):
Investment income	82	1,898	1,699	3,616
Loss on extinguishment of debt		(5,650)	5,700	(5,650)
Interest expense	(3,052)	(2,857)	(9,032)	(6,326)
Other (expenses) income	(248)	316	(632)	(23)
Other expenses, net	(3,218)	(6,293)	(7,965)	(8,383)
Income before income taxes	17,743	1,671	44,439	21,806
Income tax provision	3,191	12	4,211	3,999
Net income	$ 14,552	$ 1,659	$ 40,228	$ 17,807
Earnings per share:
Basic	$ 0.28	$ 0.03	$ 0.77	$ 0.38
Diluted	$ 0.27	$ 0.03	$ 0.75	$ 0.37
Weighted average common shares outstanding:
Basic	52,545	50,852	52,341	47,087
Diluted	53,469	51,809	53,300	47,930
Net income	$ 14,552	$ 1,659	$ 40,228	$ 17,807
Other comprehensive income (loss):
Foreign currency translation adjustment	4,390	(6,741)	5,304	(9,901)
Comprehensive income (loss)	18,942	(5,082)	45,532	7,906
Products
Revenue:
Revenue	94,029	69,419	257,521	200,701
Royalty and Other Revenue
Revenue:
Revenue	$ 31	$ 26	$ 91	$ 70