UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Beginning balance, shares at Dec. 31, 2022	20,131
Beginning balance, value at Dec. 31, 2022	$ 28,906	$ 202,514	$ (3,031)
Pension benefit obligation
Common stock issued upon exercise of options and warrants, shares	2,805
Common stock issued upon exercise of options and warrants	$ 15,678
Repurchase of common stock, shares	(1,784)
Repurchase of common stock	$ (18,464)
Stock-based compensation	$ 1,817
Net income		27,777		27,777
Ending balance, shares at Jun. 30, 2023	21,152
Ending balance, value at Jun. 30, 2023	$ 27,937	230,291	(3,031)	255,197
Beginning balance, shares at Mar. 31, 2023	20,496
Beginning balance, value at Mar. 31, 2023	$ 29,485	216,337	(3,031)
Pension benefit obligation
Common stock issued upon exercise of options and warrants, shares	1,718
Common stock issued upon exercise of options and warrants	$ 8,718
Repurchase of common stock, shares	(1,062)
Repurchase of common stock	$ (11,171)
Stock-based compensation	$ 905
Net income		13,954		13,954
Ending balance, shares at Jun. 30, 2023	21,152
Ending balance, value at Jun. 30, 2023	$ 27,937	230,291	(3,031)	255,197
Beginning balance, shares at Dec. 31, 2023	21,175
Beginning balance, value at Dec. 31, 2023	$ 28,678	247,857	(1,867)	274,668
Pension benefit obligation
Common stock issued upon exercise of options and warrants, shares	1,428
Common stock issued upon exercise of options and warrants	$ 5,915
Repurchase of common stock, shares	(1,298)
Repurchase of common stock	$ (11,172)
Stock-based compensation	$ 1,641
Net income		9,262		9,262
Ending balance, shares at Jun. 30, 2024	21,305
Ending balance, value at Jun. 30, 2024	$ 25,062	257,119	(1,867)	280,314
Beginning balance, shares at Mar. 31, 2024	21,148
Beginning balance, value at Mar. 31, 2024	$ 28,518	252,447	(1,867)
Pension benefit obligation
Common stock issued upon exercise of options and warrants, shares	1,248
Common stock issued upon exercise of options and warrants	$ 5,210
Repurchase of common stock, shares	(1,091)
Repurchase of common stock	$ (9,475)
Stock-based compensation	$ 809
Net income		4,672		4,672
Ending balance, shares at Jun. 30, 2024	21,305
Ending balance, value at Jun. 30, 2024	$ 25,062	$ 257,119	$ (1,867)	$ 280,314