Stock-Based Compensation, Stock Option Activity (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number Outstanding [Roll Forward]
Outstanding at beginning of year (in shares)	455,000	537,500
Granted during the year (in shares)	0	0
Exercised during the year (in shares)	0	0
Forfeited or expired during the year (in shares)	(5,000)	(82,500)
Outstanding at end of year (in shares)	450,000	455,000
Exercisable at end of year (in shares)	360,000	275,000
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of year (in dollars per share)	$ 1.67	$ 2.19
Granted during the year (in dollars per share)	0	0
Exercised during the year (in dollars per share)	0	0
Forfeited or expired during the year (in dollars per share)	6.00	4.98
Outstanding at end of year (in dollars per share)	1.62	1.67
Exercisable at end of year (in dollars per share)	$ 1.62	$ 1.70
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Stock based compensation expense	$ 39	$ 38
Unrecognized compensation cost	$ 7
Period of recognition for unrecognized compensation cost	2 months