CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - (UNAUDITED) - USD ($)	Total	Common stock Par value	Additional paid-in capital	Retained earnings (accumulated deficit)	Accumulated other comprehensive income	Treasury stock
44286 at Dec. 31, 2019	$ 27,275,000	$ 0	$ 34,143,000	$ (690,000)	$ 3,757,000	$ (9,935,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,787,000			2,787,000
Payment of cash dividends	(300,000)			(300,000)
Charge related to stock-based compensation	83,000		83,000
Issuance of unrestricted shares	210,000		(163,000)			373,000
Repurchase of common stock	(86,000)					(86,000)
Foreign currency translations	(1,634,000)				(1,634,000)
44469 at Mar. 31, 2020	28,335,000	0	34,063,000	1,797,000	2,123,000	(9,648,000)
44286 at Dec. 31, 2019	27,275,000	0	34,143,000	(690,000)	3,757,000	(9,935,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,534,000
Foreign currency translations	(407,000)
44469 at Sep. 30, 2020	26,244,000	0	33,765,000	3,908,000	3,350,000	(14,779,000)
44286 at Mar. 31, 2020	28,335,000	0	34,063,000	1,797,000	2,123,000	(9,648,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,130,000			1,130,000
Payment of cash dividends	(299,000)			(299,000)
Charge related to stock-based compensation	34,000		34,000
Repurchase of common stock	(5,109,000)					(5,109,000)
Foreign currency translations	548,000				548,000
44469 at Jun. 30, 2020	24,639,000	0	33,764,000	2,628,000	2,671,000	(14,424,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income Taxes Paid	0		333,000			333,000
Net income	1,616,000			1,616,000
Payment of cash dividends	(336,000)			(336,000)
Charge related to stock-based compensation	1,000		1,000
Repurchase of common stock	(355,000)					(355,000)
Foreign currency translations	679,000				679,000
44469 at Sep. 30, 2020	26,244,000	0	33,765,000	3,908,000	3,350,000	(14,779,000)
44286 at Dec. 31, 2020	25,972,000	0	33,795,000	2,213,000	5,150,000	(15,186,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,194,000			2,194,000
Payment of cash dividends	(333,000)			(333,000)
Charge related to stock-based compensation	6,000		6,000
Issuance of unrestricted shares	210,000		(44,000)			254,000
Repurchase of common stock	(350,000)					(350,000)
Foreign currency translations	(1,356,000)				(1,356,000)
44469 at Mar. 31, 2021	26,343,000	0	33,757,000	4,074,000	3,794,000	(15,282,000)
44286 at Dec. 31, 2020	25,972,000	0	33,795,000	2,213,000	5,150,000	(15,186,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,253,000
Repurchase of common stock	(4,500,000)
Foreign currency translations	(2,538,000)
44469 at Sep. 30, 2021	25,153,000	0	33,449,000	8,419,000	2,612,000	(19,327,000)
44286 at Mar. 31, 2021	26,343,000	0	33,757,000	4,074,000	3,794,000	(15,282,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,129,000			2,129,000
Payment of cash dividends	(330,000)			(330,000)
Charge related to stock-based compensation	29,000		29,000
Repurchase of common stock	(4,511,000)					(4,511,000)
Foreign currency translations	72,000				72,000
44469 at Jun. 30, 2021	23,732,000	0	33,758,000	5,873,000	3,866,000	(19,765,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income Taxes Paid	0		28,000			28,000
Net income	2,930,000
Payment of cash dividends	(384,000)			(384,000)
Charge related to stock-based compensation	7,000		7,000
Repurchase of common stock	(191,000)					(191,000)
Foreign currency translations	(1,254,000)				(1,254,000)
44469 at Sep. 30, 2021	25,153,000	$ 0	33,449,000	$ 8,419,000	$ 2,612,000	(19,327,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income Taxes Paid	$ (313,000)		$ 316,000			$ 629,000