Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Total revenue, net	$ 183,982	$ 149,599	$ 123,864
Operating expenses
Research and development	14,502	10,121	10,624
Selling, general and administrative	73,857	62,759	61,773
Total operating expenses	156,640	135,980	122,872
Gain on sale of assets	38,591	0	0
Operating income	65,933	13,619	992
Other income (expense)
Interest expense	(3,611)	(3,787)	(3,549)
Other income (expense), net	(51)	89	530
Total other expense, net	(3,662)	(3,698)	(3,019)
Income (loss) before income taxes	62,271	9,921	(2,027)
Income tax provision (benefit)	15,982	(46,280)	0
Net income (loss)	$ 46,289	$ 56,201	$ (2,027)
Earnings (loss) per common share
Basic (in dollars per share)	$ 0.27	$ 0.34	$ (0.01)
Diluted (in dollars per share)	$ 0.26	$ 0.33	$ (0.01)
Weighted average common shares outstanding
Basic (in shares)	169,226	166,066	162,574
Diluted (in shares)	174,733	170,155	162,574
Product sales, net
Revenue
Total revenue, net	$ 126,667	$ 113,834	$ 92,103
Operating expenses
Cost of product sales	54,418	53,960	46,267
Licensing and development revenue
Revenue
Total revenue, net	19,623	14,466	7,529
Operating expenses
Cost of product sales	13,863	9,140	4,208
Royalties
Revenue
Total revenue, net	$ 37,692	$ 21,299	$ 24,232