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Stock-Based Compensation Plans (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock-Based Compensation Plans
Unrecognized compensation cost	$ 2.8		$ 2.8
Weighted average life over which unrecognized compensation is expected to be recognized			1 year 2 months 4 days
General and administrative expenses
Stock-Based Compensation Plans
Stock-based compensation expense	$ 1.7	$ 1.3	$ 2.4	$ 1.9
Restricted stock awards
Stock-Based Compensation Plans
Granted (in shares)			213,250
Number of Shares
Unvested at the beginning of the period (in shares)			329,090
Granted (in shares)			213,250
Vested (in shares)			(246,856)
Unvested at the end of the period (in shares)	295,484		295,484
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the period (in dollars per share)			$ 10.56
Granted (in dollars per share)			15.70
Vested (in dollars per share)			11.74
Unvested at the end of the period (in dollars per share)	$ 13.29		$ 13.29