Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2019	$ 475,592	$ 15	$ 359,545	$ 116,032
Balance, shares at Dec. 31, 2019		15,617
Issuance of shares of common stock under restricted stock award agreements, shares		88
Forfeiture of shares of common stock under restricted stock award agreements, shares		(6)
Stock-based compensation	6,005		6,005
Shares issued for exercise of stock options	3,946	$ 1	3,945
Shares issued for exercise of stock options, shares		127
Net income	33,133			33,133
Balance at Dec. 31, 2020	518,676	$ 16	369,495	149,165
Balance, shares at Dec. 31, 2020		15,826
Issuance of shares of common stock under restricted stock award agreements, shares		89
Forfeiture of shares of common stock under restricted stock award agreements, shares		(7)
Stock-based compensation	9,434		9,434
Shares issued for exercise of stock options	1,108		1,108
Shares issued for exercise of stock options, shares		32
Net income	45,126			45,126
Balance at Dec. 31, 2021	574,344	$ 16	380,037	194,291
Balance, shares at Dec. 31, 2021		15,940
Issuance of shares of common stock under restricted stock award agreements, shares		129
Forfeiture of shares of common stock under restricted stock award agreements, shares		4
Stock-based compensation	10,625		10,625
Shares issued for exercise of stock options	2,546		2,546
Shares issued for exercise of stock options, shares		63
Net income	46,025			46,025
Balance at Dec. 31, 2022	$ 633,540	$ 16	$ 393,208	$ 240,316
Balance, shares at Dec. 31, 2022		16,128