CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Issued	Common Stock in Treasury	Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2021		24,679
Beginning balance at Dec. 31, 2021	$ 275,949	$ 247	$ (355,159)	$ 314,094	$ (13,524)	$ 330,291
Beginning balance (in shares) at Dec. 31, 2021			(11,861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,910)					(2,910)
Currency translation adjustment	1,849				1,849
Shares issued for employee benefit plan and compensation (in shares)		145
Shares issued for employee benefit plan and compensation	$ 324	$ 1		323
Purchase of treasury shares (in shares)	(225)		(225)
Purchase of treasury shares	$ (7,354)		$ (7,354)
Shares issued to directors (in shares)		7
Shares issued to directors	0
Employee and director stock-based compensation	2,499			2,499
Ending balance (in shares) at Mar. 31, 2022		24,831
Ending balance at Mar. 31, 2022	270,357	$ 248	$ (362,513)	316,916	(11,675)	327,381
Ending balance (in shares) at Mar. 31, 2022			(12,086)
Beginning balance (in shares) at Dec. 31, 2022		25,000
Beginning balance at Dec. 31, 2022	268,406	$ 250	$ (368,194)	326,839	(21,187)	330,698
Beginning balance (in shares) at Dec. 31, 2022			(12,295)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(61,363)					(61,363)
Currency translation adjustment	1,916				1,916
Shares issued for employee benefit plan and compensation (in shares)		189
Shares issued for employee benefit plan and compensation	$ 352	$ 2		350
Purchase of treasury shares (in shares)	(53)		(53)
Purchase of treasury shares	$ (812)		$ (812)
Shares issued to directors (in shares)		8
Shares issued to directors	0
Employee and director stock-based compensation	2,540			2,540
Ending balance (in shares) at Mar. 31, 2023		25,197
Ending balance at Mar. 31, 2023	$ 211,039	$ 252	$ (369,006)	$ 329,729	$ (19,271)	$ 269,335
Ending balance (in shares) at Mar. 31, 2023			(12,348)