CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (UNAUDITED) - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated other comprehensive loss	Retained Earnings (Accumulated Deficit)
Balance, shares at Dec. 31, 2019		3,786,398
Balance, amount at Dec. 31, 2019	$ 26,100,000	$ 4,000	$ 22,275,000	$ (16,000)	$ 3,837,000
Stock-based compensation expense	45,000	$ 0	45,000	0	0
Exercise of stock awards, net of tax, shares		8,002
Exercise of stock awards, net of tax, amount	0	$ 0	0	0	0
Stock repurchase and retirement, shares		(21,700)
Stock repurchase and retirement, amount	(203,000)	$ 0	(203,000)	0	0
Foreign currency translation	40,000	0	0	40,000	0
Net income	226,000	$ 0	0	0	226,000
Balance, shares at Mar. 31, 2020		3,772,700
Balance, amount at Mar. 31, 2020	26,208,000	$ 4,000	22,117,000	24,000	4,063,000
Balance, shares at Dec. 31, 2019		3,786,398
Balance, amount at Dec. 31, 2019	26,100,000	$ 4,000	22,275,000	(16,000)	3,837,000
Net income	1,787,000
Balance, shares at Sep. 30, 2020		3,741,752
Balance, amount at Sep. 30, 2020	27,364,000	$ 4,000	21,757,000	(21,000)	5,624,000
Balance, shares at Mar. 31, 2020		3,772,700
Balance, amount at Mar. 31, 2020	26,208,000	$ 4,000	22,117,000	24,000	4,063,000
Stock-based compensation expense	84,000	$ 0	84,000	0	0
Exercise of stock awards, net of tax, shares		24,000
Exercise of stock awards, net of tax, amount	0	$ 0	0	0	0
Stock repurchase and retirement, shares		(62,198)
Stock repurchase and retirement, amount	(582,000)	$ 0	(582,000)	0	0
Foreign currency translation	(3,000)	0	0	(3,000)	0
Net income	772,000	$ 0	0	0	772,000
Balance, shares at Jun. 30, 2020		3,734,502
Balance, amount at Jun. 30, 2020	26,479,000	$ 4,000	21,619,000	21,000	4,835,000
Stock-based compensation expense	72,000	$ 0	72,000	0	0
Exercise of stock awards, net of tax, shares		7,250
Exercise of stock awards, net of tax, amount	66,000	$ 0	66,000	0	0
Foreign currency translation	(42,000)	0	0	(42,000)	0
Net income	789,000	$ 0	0	0	789,000
Balance, shares at Sep. 30, 2020		3,741,752
Balance, amount at Sep. 30, 2020	27,364,000	$ 4,000	21,757,000	(21,000)	5,624,000
Balance, shares at Dec. 31, 2020		3,770,752
Balance, amount at Dec. 31, 2020	28,142,000	$ 4,000	22,214,000	(19,000)	5,943,000
Stock-based compensation expense	63,000	$ 0	63,000	0	0
Exercise of stock awards, net of tax, shares		15,000
Stock repurchase and retirement, shares		(19,777)
Foreign currency translation	3,000	$ 0	0	3,000	0
Net income	545,000	0	0	0	545,000
Exercise of stock awards, net of tax, amounts	199,000	0	199,000	0	0
Stock repurchase and retirement, amounts	(452,000)	$ 0	(452,000)	0	0
Balance, shares at Mar. 31, 2021		3,765,975
Balance, amount at Mar. 31, 2021	28,500,000	$ 4,000	22,024,000	(16,000)	6,488,000
Balance, shares at Dec. 31, 2020		3,770,752
Balance, amount at Dec. 31, 2020	$ 28,142,000	$ 4,000	22,214,000	(19,000)	5,943,000
Stock repurchase and retirement, shares	179,845
Net income	$ 2,675,000
Balance, shares at Sep. 30, 2021		3,791,038
Balance, amount at Sep. 30, 2021	30,876,000	$ 4,000	22,268,000	(14,000)	8,618,000
Balance, shares at Mar. 31, 2021		3,765,975
Balance, amount at Mar. 31, 2021	28,500,000	$ 4,000	22,024,000	(16,000)	6,488,000
Stock-based compensation expense	69,000	$ 0	69,000	0	0
Exercise of stock awards, net of tax, shares		20,550
Foreign currency translation	(5,000)	$ 0		(5,000)
Net income	1,106,000	0			1,106,000
Exercise of stock awards, net of tax, amounts	20,000	$ 0	20,000	0
Balance, shares at Jun. 30, 2021		3,786,525
Balance, amount at Jun. 30, 2021	29,690,000	$ 4,000	22,113,000	(21,000)	7,594,000
Stock-based compensation expense	100,000		100,000	0
Exercise of stock awards, net of tax, shares		4,513
Foreign currency translation	7,000	$ 0	0	7,000	0
Net income	1,024,000	$ 0	0	0	1,024,000
Exercise of stock awards, net of tax, amounts	55,000		55,000
Balance, shares at Sep. 30, 2021		3,791,038
Balance, amount at Sep. 30, 2021	$ 30,876,000	$ 4,000	$ 22,268,000	$ (14,000)	$ 8,618,000