CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2019	$ 191	$ 35,215	$ 318,572	$ (12,777)	$ 341,201
Balance (in shares) at Dec. 31, 2019	18,141,383
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net		(4,650)		3,905	(745)
Exercise of stock options, net (in shares)	284,747
Stock-based compensation expense		3,855			3,855
Capital contribution		78			78
Net income			23,678		23,678
Balance at Dec. 31, 2020	$ 191	34,498	342,250	(8,872)	368,067
Balance (in shares) at Dec. 31, 2020	18,426,130
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net		2,868		4,531	7,399
Exercise of stock options, net (in shares)	338,410
Stock-based compensation expense		4,060			4,060
Net income			68,488		68,488
Balance at Dec. 31, 2021	$ 191	41,426	410,738	(4,341)	$ 448,014
Balance (in shares) at Dec. 31, 2021	18,764,540				18,764,540
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value					$ 4,341
Exercise of stock options, net		(7,714)		10,370	2,656
Exercise of stock options, net (in shares)	406,641
Restricted stock granted		1,909		301	2,210
Restricted stock granted, shares	22,495
Purchase of company common stock				(6,500)	(6,500)
Purchase of company common stock, shares	(100,000)
Stock-based compensation expense		5,095			5,095
Net income			87,479		87,479
Balance at Dec. 31, 2022	$ 191	$ 40,716	$ 498,217	$ (170)	$ 538,954
Balance (in shares) at Dec. 31, 2022	19,093,676				19,093,676
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value					$ 170