Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenues	$ 92,509	$ 90,704
Cost of goods sold	51,479	52,702
Gross profit	41,030	38,002
Operating expenses
Sales and marketing	14,173	10,130
General and administrative	16,138	16,699
Research and development	10,360	4,048
Total operating expenses	40,671	30,877
Gain on sale of assets	15,263	0
Operating income	15,622	7,125
Interest expense	2,718	1,946
Gain on extinguishment of debt	(889)	0
Other income	(549)	(350)
Income before income taxes	14,342	5,529
Income tax expense	5,334	2,192
Net income	$ 9,008	$ 3,337
Net income per common share:
Basic (in dollars per share)	$ 0.13	$ 0.08
Diluted (in dollars per share)	$ 0.13	$ 0.08
Weighted-average common shares outstanding:
Basic (in shares)	67,094	39,433
Diluted (in shares)	67,714	40,102