Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss	$ (965)	$ (1,310)	$ (809)	$ (812)	$ (1,798)	$ (1,436)	$ (1,050)	$ (1,139)	$ (3,896)	$ (5,423)
Weighted average common shares outstanding – basic									3,415,154	3,699,278
Weighted average common shares outstanding – diluted									3,415,154	3,699,278
Earnings (Loss) Per Share, Basic (in dollars per share)	$ (0.27)	$ (0.44)	$ (0.21)	$ (0.22)	$ (0.49)	$ (0.39)	$ (0.28)	$ (0.31)	$ (1.14)	$ (1.47)
Earnings (Loss) Per Share, Diluted (in dollars per share)	$ (0.27)	$ (0.44)	$ (0.21)	$ (0.22)	$ (0.49)	$ (0.39)	$ (0.28)	$ (0.31)	$ (1.14)	$ (1.47)