Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic and diluted earnings
Net income	$ 223	$ 65	$ 243	$ 60
Weighted average outstanding shares of common stock	6,602	6,601	6,601	6,581
Dilutive potential common shares from stock options and restricted stock units	0	0	0	17
Common stock and common stock equivalents	6,602	6,601	6,601	6,598
Earnings per share:
Earnings per share, basic and diluted	$ 0.03	$ 0.01	$ 0.04	$ 0.01
Shares subject to anti-dilutive stock options and restricted stock-based awards excluded from calculation	0	2	0	2