Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income	$ 1,267	$ 268	$ 2,697	$ 859
Less: Allocation of earnings to participating securities	(7)	(1)	(15)	(6)
Net income allocated to common stock	1,260	267	2,682	853
Basic earnings per share computation:
Net income allocated to common stock	$ 1,260	$ 267	$ 2,682	$ 853
Weighted average common shares outstanding, including shares considered participating securities	7,777	7,859	7,766	7,881
Less: Weighted average participating securities outstanding	(46)	(70)	(44)	(61)
Weighted average shares of common stock	7,731	7,789	7,722	7,820
Basic earnings per share	$ 0.16	$ 0.03	$ 0.34	$ 0.11
Diluted earnings per share computation:
Net income allocated to common stock	$ 1,260	$ 267	$ 2,682	$ 853
Undistributed earnings re-allocated to participating securities	7		15
Numerator for diluted earnings per share	$ 1,267	$ 267	$ 2,697	$ 853
Weighted average common shares outstanding for basic earnings per share	7,731	7,789	7,722	7,820
Incremental shares from stock options		1		1
Weighted average shares and dilutive potential common shares	7,731	7,790	7,722	7,821
Diluted earnings per share	$ 0.16	$ 0.03	$ 0.34	$ 0.11