Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Summary of Operating Lease Balances (Details)

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Commitments and Contingencies - Summary of Operating Lease Balances (Details) - USD ($)
3 Months Ended 9 Months Ended
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2023
Feb. 28, 2022
May 31, 2022
Commitments and Contingencies.          
Operating lease costs $ 46,400 $ 46,500 $ 100,000 $ 100,000  
Right of use asset 434,000   434,000   $ 536,000
Current operating lease liability 138,000   138,000   134,000
Non-current operating lease liability 318,000   318,000   422,000
Total operating lease liability $ 456,000   $ 456,000   $ 556,000