Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock, $1 par value	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Common Stock, Shares, Outstanding	8,888,028
Balance at beginning of year at Dec. 31, 2017	$ 93,490	$ 8,921	$ 13,005	$ 71,453	$ (711)	$ 822
Net income	6,214
Adjustment for foreign currency translation	(2,382)					(2,382)
Stock-based compensation	2,703		2,703
Shares issued	0	85	(85)
Treasury share repurchased	(523)				(523)
Balance at end of year at Dec. 31, 2018	$ 99,173	9,006	15,623	77,338	(1,234)	(1,560)
Shares Issued	84,414
Treasury Stock, Shares, Acquired	(16,512)
Common Stock, Shares, Outstanding	8,955,930
Net income	$ 7,221
Adjustment for foreign currency translation	1,559					1,559
Stock-based compensation	2,638		2,638
Shares issued	0	184	(184)
Treasury share repurchased	(4,527)				(4,527)
Balance at end of year at Dec. 31, 2019	$ 108,001	$ 9,190	$ 18,077	$ 86,496	$ (5,761)	$ (1)
Shares Issued	184,455
Treasury Stock, Shares, Acquired	(96,614)
Common Stock, Shares, Outstanding	9,043,771