Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022	Apr. 30, 2023
Accounting Policies [Abstract]
Revenue recognized	$ 4.0	$ 8.3	$ 20.8	$ 26.9
Change in revenue due to change in estimate	1.8		3.2
Restricted cash					$ 0.4
Allowance for doubtful accounts	1.6		1.6		0.5
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	0.2		0.3
Depreciation and amortization expense	2.8	$ 1.8	5.4	$ 3.4
Cash equivalents	21.6		21.6		28.7
Investment in equity securities	$ 7.5		$ 7.5		$ 0.0