CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Revenue	$ 33,919	$ 38,461
Operating expenses:
Sales and marketing	1,751	1,219
Research and development	281	1,380
General and administrative	13,960	11,442
Total operating expenses	15,992	14,041
Operating income	17,927	24,420
Interest and other income (loss), net	24,988	2,545
Income before benefit from (provision for) income taxes	42,915	26,965
Benefit from (provision for) income taxes	(8,939)	3,699
Net income	$ 33,976	$ 30,664
Basic net income per share (in dollars per share)	$ 1.05	$ 0.92
Shares used in calculating basic net income per share (in shares)	32,214	33,280
Diluted net income per share (in dollars per share)	$ 1.04	$ 0.92
Shares used in calculating diluted net income per share (in shares)	32,536	33,508
Deferred gains (losses) on available-for-sale marketable debt securities	$ 1,200	$ (944)
Realized gains on available-for-sale marketable debt securities reclassified to net income	300	734
Total comprehensive income	35,476	30,454
Accumulated Deficit
Operating expenses:
Net income	33,976	30,664
Royalty and license
Revenues:
Revenue	33,781	38,178
Development, services, and other
Revenues:
Revenue	$ 138	$ 283