Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic and diluted earnings
Net income (loss)	$ 63	$ 13	$ 20	$ (5)
Weighted average outstanding shares of common stock	6,601	6,580	6,601	6,571
Dilutive potential common shares from stock options and restricted stock units	0	0	0	0
Common stock and common stock equivalents	6,601	6,580	6,601	6,571
Earnings per share:
Earnings (loss) per share, basic and diluted	$ 0.01	$ 0.00	$ 0.00	$ 0.00
Shares subject to anti-dilutive stock options and restricted stock-based awards excluded from calculation	0	3	0	3
Earnings (loss) per share, basic	$ 0.01	$ 0.00	$ 0.00	$ 0.00
Earnings (loss) per share - diluted	$ 0.01	$ 0.00	$ 0.00	$ 0.00