Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Numerator
Net income per consolidated statements of income	$ (702)	$ 3,785	$ 2,630	$ 6,482
Percentage allocated to shareholders *	99.50%	99.40%	99.50%	99.50%
Numerator for basic and diluted earnings per share	$ (699)	$ 3,761	$ 2,617	$ 6,447
Denominator
Denominator for Basic earnings per share - weighted-average shares outstanding	7,621	7,674	7,593	7,662
Dilutive effect of stock options	0	0	0	0
Denominator for diluted earnings per share	7,621	7,674	7,593	7,662
Per share income from continuing operations
Basic	$ (0.09)	$ 0.49	$ 0.34	$ 0.84
Diluted	$ (0.09)	$ 0.49	$ 0.34	$ 0.85