Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 31, 2017	2,043,000
Balances at Dec. 31, 2017	$ 19,480		$ (13,584)	$ 5,896
Exercise of stock options (in shares)	5,000			5,500
Exercise of stock options	$ 39			$ 39
Stock repurchase (in shares)	(18,000)
Stock repurchase	$ (93)			(93)
Share-based compensation (in shares)
Share-based compensation
Net income (loss)			1,486	1,486
Balances (in shares) at Dec. 31, 2018	2,030,000
Balances at Dec. 31, 2018	$ 19,426		(12,098)	$ 7,328
Exercise of stock options (in shares)
Exercise of stock options
Stock repurchase (in shares)	(130,000)
Stock repurchase	$ (717)			(717)
Share-based compensation (in shares)	25,000
Share-based compensation	$ 139			139
Net income (loss)			(7)	(7)
Balances (in shares) at Dec. 31, 2019	1,925,000
Balances at Dec. 31, 2019	$ 18,848		$ (12,105)	$ 6,743