Subsequent Events	12 Months Ended
May 31, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events June 2025 At-the-Market Sales Agreement On June 2, 2025, the Company entered into a Sales Agreement with Northland Securities, Inc. and Wells Fargo Securities, LLC (the “June 2025 Sales Agreement”), pursuant to which, up to $200,000,000 of shares of the Company's common stock may be issued if and when sold. As of the date of this report, the Company has issued and sold approximately 15.1 million shares under the June 2025 Sales Agreement for gross proceeds of approximately $193.9 million. Issuance of Series G Preferred Stock On July 16, 2025, the Company issued 78,000 shares of Series G Preferred Stock for aggregate gross proceeds of $75.0 million. Conversion of Series G Preferred Stock As of the date of this report, a total of 156,000 shares of Series G Preferred Stock have been converted into approximately 21.0 million shares of the Company's common stock. CoreWeave Data Center Lease On July 24, 2025, CoreWeave exercised its lease option for an additional 150 MW in a third building at Polaris Forge 1, which is currently in planning stages with an anticipated ready for service date in 2027. Under the option terms, the parties are expected to enter into a new, third lease agreement on substantially the same terms, including the same rent and escalators, as the existing two Data Center Leases, within 60 days.

Subsequent Events

12 Months Ended

May 31, 2025

June 2025 At-the-Market Sales Agreement

On June 2, 2025, the Company entered into a Sales Agreement with Northland Securities, Inc. and Wells Fargo Securities, LLC (the “June 2025 Sales Agreement”), pursuant to which, up to $200,000,000 of shares of the Company's common stock may be issued if and when sold. As of the date of this report, the Company has issued and sold approximately 15.1 million shares under the June 2025 Sales Agreement for gross proceeds of approximately $193.9 million.

Issuance of Series G Preferred Stock

On July 16, 2025, the Company issued 78,000 shares of Series G Preferred Stock for aggregate gross proceeds of $75.0 million.

Conversion of Series G Preferred Stock

As of the date of this report, a total of 156,000 shares of Series G Preferred Stock have been converted into approximately 21.0 million shares of the Company's common stock.

CoreWeave Data Center Lease

On July 24, 2025, CoreWeave exercised its lease option for an additional 150 MW in a third building at Polaris Forge 1, which is currently in planning stages with an anticipated ready for service date in 2027. Under the option terms, the parties are expected to enter into a new, third lease agreement on substantially the same terms, including the same rent and escalators, as the existing two Data Center Leases, within 60 days.