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Stock Plans (Detail Textuals) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Aug. 31, 2019	May 31, 2019
Equity Class Of Treasury Stock [Line Items]
Number of shares repurchased	17,000	77,000	222,000	137,000
Aggregate cost of shares repurchased	$ 541,000	$ 887,000	$ 2,279,000	$ 1,552,000
New Stock Repurchase Program | Common Stock
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 1,000,000.0	$ 8,000,000.0
Number of shares repurchased	17,007
Aggregate cost of shares repurchased	$ 141,000
Shares repurchased, average cost per share	$ 8.30

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