Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	6,160		668
Balance at Dec. 31, 2017	$ 31	$ 31,022	$ (10,082)	$ (2,113)	$ (238)	$ 18,620
Shares issued – vested (in shares)	15
Shares issued – vested
Tax withholding related to vested shares from employee stock plans		(93)				(93)
Stock compensation expense		594				594
Cash dividends declared				(3,797)		(3,797)
Net income (loss)				4,584		4,584
Foreign currency translation, net of taxes					(1,161)	(1,161)
Balance (in shares) at Dec. 31, 2018	6,175		668
Balance at Dec. 31, 2018	$ 31	31,523	$ (10,082)	(1,326)	(1,399)	18,747
Shares issued – vested (in shares)	10
Shares issued – vested
Tax withholding related to vested shares from employee stock plans		(33)				(33)
Stock compensation expense		759				759
Cash dividends declared				(3,970)		(3,970)
Net income (loss)				1,542		1,542
Foreign currency translation, net of taxes					(225)	(225)
Balance (in shares) at Dec. 31, 2019	6,185		668
Balance at Dec. 31, 2019	$ 31	32,249	$ (10,082)	(3,754)	(1,624)	16,820
Shares issued – vested (in shares)	20
Shares issued – vested
Tax withholding related to vested shares from employee stock plans		(9)				(9)
Stock compensation expense		563				563
Cash dividends declared				(993)		(993)
Net income (loss)				(3,859)		(3,859)
Foreign currency translation, net of taxes					(10)	(10)
Balance (in shares) at Dec. 31, 2020	6,205		668
Balance at Dec. 31, 2020	$ 31	$ 32,803	$ (10,082)	$ (8,606)	$ (1,634)	$ 12,512