Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning Balances at Dec. 31, 2021	$ 51,817	$ 2	$ 24,251	$ (26)	$ 27,590
Beginning Balances, Shares at Dec. 31, 2021		17,928,748
Other comprehensive (income) loss - unrealized gain (loss) on available-for-sale debt securities	(121)			(121)
Issuance of common stock upon exercise of stock options and vesting of early exercised options	210		210
Issuance of common stock upon exercise of stock options and vesting of early exercised options, Shares		119,455
Issuance of common stock upon vesting of restricted stock units, Shares		173,375
Shares repurchased for tax withholdings on vesting of restricted stock units	(228)		(228)
Shares repurchased for tax withholdings on vesting of restricted stock units, Shares		(22,841)
Stock-based compensation	1,813		1,813
Cash dividends declared	(9,078)				(9,078)
Net income	17,663				17,663
Ending Balances at Dec. 31, 2022	62,076	$ 2	26,046	(147)	36,175
Ending Balances, Shares at Dec. 31, 2022		18,198,737
Other comprehensive (income) loss - unrealized gain (loss) on available-for-sale debt securities	165			165
Issuance of common stock upon exercise of stock options and vesting of early exercised options	45		45
Issuance of common stock upon exercise of stock options and vesting of early exercised options, Shares		33,540
Issuance of common stock upon vesting of restricted stock units, Shares		186,750
Shares repurchased for tax withholdings on vesting of restricted stock units	(166)		(166)
Shares repurchased for tax withholdings on vesting of restricted stock units, Shares		(23,345)
Stock-based compensation	1,552		1,552
Cash dividends declared	(9,186)				(9,186)
Net income	17,809				17,809
Ending Balances at Dec. 31, 2023	$ 72,295	$ 2	$ 27,477	$ 18	$ 44,798
Ending Balances, Shares at Dec. 31, 2023		18,395,682