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Income Taxes, Unrecognized Tax Benefits (Details) - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Unrecognized tax benefits [Roll Forward]      
Balance at beginning of period $ 1,975,000 $ 1,104,000 $ 1,011,000
Additions based on tax positions related to the current year 53,000 352,000 249,000
Additions for tax positions of prior year 0 581,000 67,000
Reductions for tax positions of prior year (64,000) (62,000) (223,000)
Balance at end of period 1,964,000 1,975,000 1,104,000
Unrecognized tax benefits that would impact effective tax rate 1,616,000 1,632,000 923,000
Recognized interest and penalties 59,000 112,000 $ (16,000)
Interest and penalties accrued $ 229,000 $ 170,000