Equity Incentive Plan - Deferred Stock Units ("DSU") (Details) - Deferred Stock Units - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Shares
Nonvested at the beginning of the period (in shares)	99,535
Granted (in shares)	252
Nonvested at the end of the period (in shares)	99,787
Weighted-Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 27.38
Granted (in dollars per share)	37.30
Nonvested at the end of the period (in dollars per share)	$ 27.40
Unrecognized compensation	$ 0.2
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted	2 months 12 days
Stock based compensation expense	$ 0.2	$ 0.1

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
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