Equity Incentive Plan - Deferred Stock Units ("DSU") (Details) - Deferred Stock Units - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Shares
Nonvested at the beginning of the period (in shares)			99,535
Granted (in shares)			12,924
Vested (in shares)			(16,102)
Nonvested at the end of the period (in shares)	96,357		96,357
Weighted-Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)			$ 27.38
Granted (in dollars per share)			59.49
Vested (in dollars per share)			22.91
Nonvested at the end of the period (in dollars per share)	$ 32.42		$ 32.42
Unrecognized compensation	$ 0.5		$ 0.5
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted			8 months 12 days
Stock based compensation expense	$ 0.2	$ 0.2	$ 0.7	$ 0.5