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, 2022		$ 177,842	$ 275	[1]	$ 32,538	[1]	$ (27,594)	$ 172,623
Beginning Balance, shares at Dec. 31, 2022	[1]		27,483
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		339	$ 1	[1]	338	[1]
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares	[1]		122
Common stock repurchased on vesting of restricted stock units and performance awards		(1,005)			(1,005)	[1]
Common stock repurchased on vesting of restricted stock units and performance awards, shares	[1]		(43)
Share-based compensation expense		1,928			1,928	[1]
Company repurchases of common stock		(8,030)	$ (4)	[1]	(444)	[1]		(7,582)
Company repurchases of common stock, shares	[1]		(362)
Cash dividends on common stock		(2,067)						(2,067)
Unrealized gain (loss) on investments, net of tax		3,652					3,652
Net (loss) income		819						819
Ending Balance at Mar. 31, 2023		173,478	$ 272	[1]	33,355	[1]	(23,942)	163,793
Ending Balance, shares at Mar. 31, 2023	[1]		27,200
Beginning Balance at Dec. 31, 2022		177,842	$ 275	[1]	32,538	[1]	(27,594)	172,623
Beginning Balance, shares at Dec. 31, 2022	[1]		27,483
Unrealized gain (loss) on investments, net of tax		1,624
Net (loss) income		17,835
Ending Balance at Jun. 30, 2023		177,969	$ 267	[1]	34,376	[1]	(25,970)	169,296
Ending Balance, shares at Jun. 30, 2023	[1]		26,744
Beginning Balance at Mar. 31, 2023		173,478	$ 272	[1]	33,355	[1]	(23,942)	163,793
Beginning Balance, shares at Mar. 31, 2023	[1]		27,200
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		2			2	[1]
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares	[1]		50
Common stock repurchased on vesting of restricted stock units and performance awards		(304)			(304)	[1]
Common stock repurchased on vesting of restricted stock units and performance awards, shares	[1]		(14)
Share-based compensation expense		1,963			1,963	[1]
Company repurchases of common stock		(10,145)	$ (5)	[1]	(640)	[1]		(9,500)
Company repurchases of common stock, shares	[1]		(492)
Cash dividends on common stock		(2,013)						(2,013)
Unrealized gain (loss) on investments, net of tax		(2,028)					(2,028)
Net (loss) income		17,016						17,016
Ending Balance at Jun. 30, 2023		177,969	$ 267	[1]	34,376	[1]	(25,970)	169,296
Ending Balance, shares at Jun. 30, 2023	[1]		26,744
Beginning Balance at Dec. 31, 2023		199,140	$ 263	[2]	36,743	[2]	(20,801)	182,935
Beginning Balance, shares at Dec. 31, 2023	[2]		26,290
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		376	$ 1	[2]	375	[2]
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares	[2]		140
Common stock repurchased on vesting of restricted stock units and performance awards		(1,456)	$ (1)	[2]	(1,455)	[2]
Common stock repurchased on vesting of restricted stock units and performance awards, shares	[2]		(50)
Share-based compensation expense		2,187			2,187	[2]
Company repurchases of common stock		(7,056)	$ (2)	[2]	(350)	[2]		(6,704)
Company repurchases of common stock, shares	[2]		(236)
Cash dividends on common stock		(1,970)						(1,970)
Unrealized gain (loss) on investments, net of tax		(1,496)					(1,496)
Net (loss) income		(136)						(136)
Ending Balance at Mar. 31, 2024		189,589	$ 261	[2]	37,500	[2]	(22,297)	174,125
Ending Balance, shares at Mar. 31, 2024	[2]		26,144
Beginning Balance at Dec. 31, 2023		199,140	$ 263	[2]	36,743	[2]	(20,801)	182,935
Beginning Balance, shares at Dec. 31, 2023	[2]		26,290
Unrealized gain (loss) on investments, net of tax		(1,539)
Net (loss) income		16,565
Ending Balance at Jun. 30, 2024		198,961	$ 259	[2]	38,882	[2]	(22,340)	182,160
Ending Balance, shares at Jun. 30, 2024	[2]		25,949
Beginning Balance at Mar. 31, 2024		189,589	$ 261	[2]	37,500	[2]	(22,297)	174,125
Beginning Balance, shares at Mar. 31, 2024	[2]		26,144
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards		7			7	[2]
Common stock issued on exercise of options, purchase of ESPP shares and vesting of restricted stock units and performance awards, shares	[2]		41
Common stock repurchased on vesting of restricted stock units and performance awards		(397)			(397)	[2]
Common stock repurchased on vesting of restricted stock units and performance awards, shares	[2]		(13)
Share-based compensation expense		2,106			2,106	[2]
Company repurchases of common stock		(7,047)	$ (2)	[2]	(334)	[2]		(6,711)
Company repurchases of common stock, shares	[2]		(223)
Cash dividends on common stock		(1,955)						(1,955)
Unrealized gain (loss) on investments, net of tax		(43)					(43)
Net (loss) income		16,701						16,701
Ending Balance at Jun. 30, 2024		$ 198,961	$ 259	[2]	$ 38,882	[2]	$ (22,340)	$ 182,160
Ending Balance, shares at Jun. 30, 2024	[2]		25,949

[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.

[2] 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.