CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Revenue	$ 7,983	$ 11,010	$ 15,291	$ 18,169
Costs and expenses:
Cost of revenues	0	41	4	70
Sales and marketing	218	1,194	704	2,300
Research and development	355	1,332	864	2,639
General and administrative	3,304	2,636	6,010	4,860
Total costs and expenses	3,877	5,203	7,582	9,869
Operating income	4,106	5,807	7,709	8,300
Interest and other income (loss), net	(6,099)	40	(4,065)	(276)
Income (loss) before benefit from (provision for) income taxes	(1,993)	5,847	3,644	8,024
Benefit from (provision for) income taxes	174	(506)	(387)	(647)
Net income (loss)	$ (1,819)	$ 5,341	$ 3,257	$ 7,377
Basic net income (loss) per share (in dollars per share)	$ (0.05)	$ 0.17	$ 0.10	$ 0.25
Shares used in calculating basic net income (loss) per share (in shares)	33,616	30,982	33,638	29,787
Diluted net income (loss) per share (in dollars per share)	$ (0.05)	$ 0.17	$ 0.10	$ 0.24
Shares used in calculating diluted net income (loss) per share (in shares)	33,616	31,247	33,955	30,253
Other comprehensive income, net of tax
Change in unrealized losses on available-for-sale securities	$ (1,054)	$ 0	$ (813)	$ 0
Total other comprehensive loss	(1,054)	0	(813)	0
Total comprehensive income (loss)	(2,873)	5,341	2,444	7,377
Royalty and license
Revenues:
Revenue	7,918	10,881	15,148	17,949
Development, services, and other
Revenues:
Revenue	$ 65	$ 129	$ 143	$ 220