CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Revenue	$ 7,308	$ 7,159
Costs and expenses:
Cost of revenues	4	29
Sales and marketing	486	1,106
Research and development	509	1,307
General and administrative	2,706	2,224
Total costs and expenses	3,705	4,666
Operating income	3,603	2,493
Interest and other income (loss), net	2,034	(316)
Income before provision for income taxes	5,637	2,177
Provision for income taxes	(561)	(141)
Net income	$ 5,076	$ 2,036
Basic net income (loss) per share (in dollars per share)	$ 0.15	$ 0.07
Shares used in calculating basic net income (loss) per share (in shares)	33,996	28,579
Diluted net income (loss) per share (in dollars per share)	$ 0.15	$ 0.07
Shares used in calculating diluted net income (loss) per share (in shares)	34,268	29,180
Other comprehensive income, net of tax
Change in unrealized gains on available-for-sale securities	$ 241	$ 0
Total other comprehensive income	241	0
Total comprehensive income	5,317	2,036
Royalty and license
Revenues:
Revenue	7,230	7,068
Development, services, and other
Revenues:
Revenue	$ 78	$ 91