Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 268	$ 582	$ 859	$ 2,000
Less: Allocation of earnings to participating securities	(1)	(5)	(6)	(15)
Net income allocated to common stock	267	577	853	1,985
Basic earnings per share computation:
Net income allocated to common stock	$ 267	$ 577	$ 853	$ 1,985
Weighted average common shares outstanding, including shares considered participating securities	7,859	7,774	7,881	7,859
Less: Weighted average participating securities outstanding	(70)	(61)	(61)	(65)
Weighted average shares of common stock	7,789	7,713	7,820	7,794
Basic earnings per share	$ 0.03	$ 0.07	$ 0.11	$ 0.25
Diluted earnings per share computation:
Net income allocated to common stock	$ 267	$ 577	$ 853	$ 1,985
Numerator for diluted earnings per share	$ 267	$ 577	$ 853	$ 1,985
Weighted average common shares outstanding for basic earnings per share	7,789	7,713	7,820	7,794
Incremental shares from stock options	1	6	1	6
Weighted average shares and dilutive potential common shares	7,790	7,719	7,821	7,800
Diluted earnings per share	$ 0.03	$ 0.07	$ 0.11	$ 0.25