Annual report pursuant to Section 13 and 15(d)

Convertible Instruments and Accrued Interest - Components (Details)

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Convertible Instruments and Accrued Interest - Components (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 23, 2021
Apr. 02, 2021
May 31, 2024
Debt Instrument      
Outstanding balance, beginning     $ 45,729
Consideration received     1,673
Amortization of issuance discount and costs     1,511
Interest expense     4,659
Fair market value of shares and warrants exchanged for repayment     (14,187)
Difference between market value of common shares and reduction of principal     (5,635)
Outstanding balance, ending     45,020
Long-term Convertible Note - April 2, 2021 Note      
Debt Instrument      
Outstanding balance, beginning     9,674
Consideration received   $ 25,000  
Amortization of issuance discount and costs     166
Interest expense     830
Fair market value of shares and warrants exchanged for repayment     (4,737)
Difference between market value of common shares and reduction of principal     (1,487)
Outstanding balance, ending     7,420
Long-term Convertible Note - April 23, 2021 Note      
Debt Instrument      
Outstanding balance, beginning     35,336
Consideration received $ 25,000    
Amortization of issuance discount and costs     460
Interest expense     3,804
Fair market value of shares and warrants exchanged for repayment     (2,513)
Difference between market value of common shares and reduction of principal     (513)
Outstanding balance, ending     37,600
Placement Agent Notes      
Debt Instrument      
Outstanding balance, beginning     719
Consideration received     975
Amortization of issuance discount and costs     583
Interest expense     18
Fair market value of shares and warrants exchanged for repayment     (4,379)
Difference between market value of common shares and reduction of principal     (2,084)
Short Term Notes      
Debt Instrument      
Consideration received     698
Amortization of issuance discount and costs     302
Interest expense     7
Fair market value of shares and warrants exchanged for repayment     (2,558)
Difference between market value of common shares and reduction of principal     $ (1,551)