Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	May 31, 2019
EPS - basic and diluted:
Net income	$ 851	$ 1,917	$ 1,917
Less: cumulative preferred stock dividend	(19)	(19)
Net income attributable to common shareholders	$ 832	$ 1,898
Earnings per common share - basic and diluted	$ 0.17	$ 0.39