Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock [Member]		Additional Paid-in Capital [Member]		Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2023		$ 199,140	$ 263	[1]	$ 36,743	[1]	$ (20,801)	$ 182,935
Beginning Balance, shares at Dec. 31, 2023	[1]		26,290
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		376	$ 1	[1]	375	[1]
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares	[1]		140
Common stock repurchased on vesting of restricted stock units and performance awards		(1,456)	$ (1)	[1]	(1,455)	[1]
Common stock repurchased on vesting of restricted stock units and performance awards, shares	[1]		(50)
Share-based compensation expense		2,187			2,187	[1]
Company repurchases of common stock		(7,056)	$ (2)	[1]	(350)	[1]		(6,704)
Company repurchases of common stock, shares	[1]		(236)
Cash dividends on common stock		(1,970)						(1,970)
Unrealized gain (loss) on investments, net of tax		(1,496)					(1,496)
Net loss		(136)						(136)
Ending Balance at Mar. 31, 2024		189,589	$ 261	[1]	37,500	[1]	(22,297)	174,125
Ending Balance, shares at Mar. 31, 2024	[1]		26,144
Beginning Balance at Dec. 31, 2024		221,404	$ 258		40,396		(19,245)	199,995
Beginning Balance, shares at Dec. 31, 2024			25,784
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		693	$ 2		691
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares			179
Common stock repurchased on vesting of restricted stock units and performance awards		(2,272)	$ (1)		(2,271)
Common stock repurchased on vesting of restricted stock units and performance awards, shares			(56)
Share-based compensation expense		2,658			2,658
Company repurchases of common stock		(9,160)	$ (2)		(366)			(8,792)
Company repurchases of common stock, shares			(229)
Cash dividends on common stock		(2,059)						(2,059)
Unrealized gain (loss) on investments, net of tax		3,108					3,108
Net loss		(1,021)						(1,021)
Ending Balance at Mar. 31, 2025		$ 213,351	$ 257		$ 41,108		$ (16,137)	$ 188,123
Ending Balance, shares at Mar. 31, 2025			25,678

[1] Prior period results have been adjusted to reflect the four-for-one stock split effected in the form of a stock dividend in June 2024. See Note 1, Basis of Presentation of Interim Period Statements for details.