Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Consolidated Statements of Operations
Net sales	$ 171,913	$ 150,246	$ 492,338	$ 430,305
Cost of sales	101,962	87,077	292,109	252,055
Gross profit	69,951	63,169	200,229	178,250
Operating expenses, net:
Research and development	27,104	21,999	77,237	66,397
Selling, general, and administrative	22,144	21,603	67,987	63,325
Amortization of intangible assets	2,505	2,976	7,514	9,305
Other operating expense (income), net	634	175	587	138
Total operating expenses, net	52,387	46,753	153,325	139,165
Operating income	17,564	16,416	46,904	39,085
Interest income	571	95	873	464
Interest expense	(2,886)	(7,107)	(8,626)	(20,685)
Income before income taxes	15,249	9,404	39,151	18,864
Income tax expense (benefit)	208	411	1,125	1,029
Net income	$ 15,041	$ 8,993	$ 38,026	$ 17,835
Income per common share:
Basic (in dollars per share)	$ 0.30	$ 0.18	$ 0.76	$ 0.36
Diluted (in dollars per share)	$ 0.27	$ 0.17	$ 0.70	$ 0.33
Weighted average number of shares:
Basic (in shares)	49,887	49,021	49,831	48,968
Diluted (in shares)	65,151	53,849	65,090	53,606