CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Total revenues	$ 36,538	$ 26,839
Costs and expenses:
Cost of sales	4,195	3,966
Selling, general and administrative expenses	10,638	8,324
Fair value of contingent consideration	1,645	(594)
Amortization of intangible assets	8,501	6,547
Restructuring charges	0	1,089
Total costs and expenses	24,979	19,332
Income from operations	11,559	7,507
Other (expense) income:
Interest expense	(2,327)	(2,684)
Other gain	545	269
Total other expense	(1,782)	(2,415)
Net income before income taxes	9,777	5,092
Income tax expense	(713)	(548)
Net income (loss)	9,064	4,544
Comprehensive income (loss)	$ 9,064	$ 4,544
Basic net income (loss) per share (in dollars per share)	$ 0.20	$ 0.12
Diluted net income (loss) per share (in dollars per share)	$ 0.20	$ 0.12
Shares used in computing basic net income (loss) per share (in shares)	45,204	37,824
Shares used in computing diluted net income (loss) per share (in shares)	46,127	38,480
Product sales, net
Revenues:
Total revenues	$ 35,546	$ 26,027
Royalties and milestones
Revenues:
Total revenues	992	434
Other revenue
Revenues:
Total revenues	$ 0	$ 378