Consolidated Condensed Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Product revenues	$ 266,005	$ 136,061	$ 554,540	$ 364,674
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 186,792	$ 109,326	$ 387,658	$ 271,872
Gross margin	79,213	26,735	166,882	92,802
Operating expenses:
Net research and development expenses	18,227	15,341	35,830	33,101
Selling, general and administrative expenses	27,223	21,889	55,749	47,729
Restructuring expenses	2,091	(598)	2,882	3,168
Total operating expenses	47,541	36,632	94,461	83,998
Operating income (loss)	31,672	(9,897)	72,421	8,804
Interest expense, net	(630)	(1,361)	(1,669)	(2,109)
Foreign currency (loss) gain	(515)	(1,741)	258	(2,679)
Other income	12	2,882	3	3,146
Earnings (loss) before income tax	30,539	(10,117)	71,013	7,162
Income tax expense	5,748	205	13,313	5,611
Net income (loss)	$ 24,791	$ (10,322)	$ 57,700	$ 1,551
Basic earnings (loss) per share	$ 0.75	$ (0.32)	$ 1.75	$ 0.05
Diluted earnings (loss) per share	$ 0.74	$ (0.32)	$ 1.72	$ 0.05
Weighted average number of shares – basic	33,100,230	32,579,549	33,025,432	32,635,322
Weighted average number of shares – diluted	33,544,208	32,579,549	33,468,849	32,868,714