Annual report pursuant to Section 13 and 15(d)

Convertible Instruments and Accrued Interest - Outstanding Balance (Details)

v3.23.2
Convertible Instruments and Accrued Interest - Outstanding Balance (Details) - USD ($)
$ in Thousands
May 31, 2023
May 31, 2022
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal $ 36,450 $ 38,319
Less: Unamortized debt discount and issuance costs (1,319) (2,078)
Convertible notes payable, net 35,131 36,241
Accrued interest on convertible notes 10,598 5,974
Outstanding convertible notes payable, net and accrued interest 45,729 42,215
Long-term Convertible Note - April 2, 2021 Note    
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal 6,081 9,819
Less: Unamortized debt discount and issuance costs (211) (512)
Convertible notes payable, net 5,870 9,307
Accrued interest on convertible notes 3,804 2,599
Outstanding convertible notes payable, net and accrued interest 9,674 11,906
Long-term Convertible Note - April 23, 2021 Note    
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal 29,369 28,500
Less: Unamortized debt discount and issuance costs (822) (1,566)
Convertible notes payable, net 28,547 26,934
Accrued interest on convertible notes 6,789 3,375
Outstanding convertible notes payable, net and accrued interest 35,336 $ 30,309
Placement Agent Notes    
Debt Instrument [Line Items]    
Convertible notes payable outstanding principal 1,000  
Less: Unamortized debt discount and issuance costs (286)  
Convertible notes payable, net 714  
Accrued interest on convertible notes 5  
Outstanding convertible notes payable, net and accrued interest $ 719