Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments and Accrued Interest - Outstanding Balance (Details)

v3.23.1
Convertible Instruments and Accrued Interest - Outstanding Balance (Details) - USD ($)
$ in Thousands
Feb. 28, 2023
May 31, 2022
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal $ 36,319 $ 38,319
Less: Unamortized debt discount and issuance costs (306) (2,078)
Convertible notes payable, net 36,013 36,241
Accrued interest on convertible notes 9,421 5,974
Outstanding convertible notes payable, net and accrued interest 45,434 42,215
Long-term Convertible Note - April 2, 2021 Note    
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal 7,819 9,819
Less: Unamortized debt discount and issuance costs (49) (512)
Convertible notes payable, net 7,770 9,307
Accrued interest on convertible notes 3,535 2,599
Outstanding convertible notes payable, net and accrued interest 11,305 11,906
Long-term Convertible Note - April 23, 2021 Note    
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal 28,500 28,500
Less: Unamortized debt discount and issuance costs (257) (1,566)
Convertible notes payable, net 28,243 26,934
Accrued interest on convertible notes 5,886 3,375
Outstanding convertible notes payable, net and accrued interest $ 34,129 $ 30,309