Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2019	15,227,604
Balance at Dec. 31, 2019	$ 15	$ 57,442	$ 107,581	$ (7,484)	$ 157,554
Restricted shares issued (in shares)	38,015
Restricted shares issued					0
Share-based compensation expense		399			399
Cash dividends declared			(1,521)		(1,521)
Tax provision from vesting of acquisition-related restricted stock		(13)			(13)
Common stock reacquired and retired (in shares)	(43,458)
Common stock reacquired and retired		(159)	(341)		(500)
Net earnings			3,367		3,367
Cash flow hedges, net of taxes				(5)	(5)
Pensions, net of taxes				348	348
Change in currency translation adjustment, net of taxes				(1,239)	(1,239)
Tax benefit from vesting of acquisition-related restricted stock		(13)			(13)
Balance (in shares) at Mar. 31, 2020	15,222,161
Balance at Mar. 31, 2020	$ 15	57,669	109,086	(8,380)	$ 158,390
Balance (in shares) at Dec. 31, 2020	15,391,660				15,391,660
Balance at Dec. 31, 2020	$ 15	61,844	141,972	(12,201)	$ 191,630
Restricted shares issued (in shares)	140,754
Restricted shares issued					0
Share-based compensation expense		832			832
Cash dividends declared			(1,548)		(1,548)
Tax provision from vesting of acquisition-related restricted stock		171			171
Net earnings			10,478		10,478
Cash flow hedges, net of taxes				(5)	(5)
Pensions, net of taxes				714	714
Change in currency translation adjustment, net of taxes				(647)	$ (647)
Common shares issued upon exercise of options, net (in shares)	10,746				18,907
Common shares issued upon exercise of options, net		298	(168)		$ 130
Performance based shares issued (in shares)	39,675
Performance based shares issued					0
Tax withheld on exercise of performance based shares		(372)			(372)
Tax benefit from vesting of acquisition-related restricted stock		171			$ 171
Balance (in shares) at Mar. 31, 2021	15,582,835				15,582,835
Balance at Mar. 31, 2021	$ 15	$ 62,773	$ 150,734	$ (12,139)	$ 201,383