CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues:
Total revenues	$ 7,074	$ 7,308
Operating expenses:
Sales and marketing	96	486
Research and development	130	513
General and administrative	3,589	2,706
Total operating expenses	3,815	3,705
Operating income	3,259	3,603
Interest and other income (loss), net	6,526	2,034
Income before provision for income taxes	9,785	5,637
Provision for income taxes	(1,507)	(561)
Net income	$ 8,278	$ 5,076
Basic net income per share	$ 0.25	$ 0.15
Shares used in calculating basic net income per share	32,603	33,996
Diluted net income per share	$ 0.25	$ 0.15
Shares used in calculating diluted net income per share	33,085	34,268
Other comprehensive income, net of tax
Deferred gains on available-for-sale marketable debt securities	$ 565	$ 530
Realized gains on available-for-sale marketable debt securities reclassified to net income	(190)	(289)
Total comprehensive income	8,653	5,317
Accumulated Deficit
Operating expenses:
Net income	8,278	5,076
Royalty and license
Revenues:
Total revenues	7,009	7,230
Development, services, and other revenue
Revenues:
Total revenues	$ 65	$ 78