Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Deficit

v3.23.2
Consolidated Statements of Stockholders' Deficit - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock
Common Stock
Private Warrant Exchange
Common Stock
Private Equity Offering
Common Stock
Treasury Stock
Additional Paid-in Capital
Private Warrant Exchange
Additional Paid-in Capital
Private Equity Offering
Additional Paid-in Capital
Accumulated Deficit
Private Warrant Exchange
Private Equity Offering
Total
Beginning balance at May. 31, 2021       $ 626       $ 532,031 $ (553,675)     $ (21,018)
Beginning balance (shares) at May. 31, 2021 96     626,123 443              
Issuance of stock for convertible note repayment       $ 37       68,344       68,381
Issuance of stock for convertible note repayment (in shares)       37,110                
Loss on induced conversion                       37,381
Issuance of legal settlement, warrants               2,863       2,863
Stock option exercises       $ 1       389       390
Stock option exercises (in shares)       510                
Stock issued for compensation and tendered for income tax       $ 2       666       668
Stock issued for compensation and tendered for income tax (in shares)       2,582                
Stock issued for private offerings     $ 38       $ 46,473       $ 46,511  
Stock issued for private offerings (in shares)     38,035                  
Offering costs related to stock issuance               (5,316)       (5,316)
Conversion of preferred stock to common stock       $ 3       (3)        
Conversion of preferred stock to common stock (in shares) (61)     3,200                
Warrant exercises   $ 8   $ 2   $ 5,382   1,034   $ 5,390   1,036
Warrant exercises (in shares)   7,920   1,642                
Inducement interest expense related to private warrant exchange       $ 2       6,689       6,691
Inducement interest expense related to private warrant exchange (in shares)       2,293                
Preferred stock dividends accrued and paid in common stock Preferred stock dividends accrued and paid in common stock upon conversion       $ 1       305 (1,636)     (1,330)
Preferred stock dividends accrued and paid in common stock Preferred stock dividends accrued and paid in common stock upon conversion (in shares)       (613)                
Stock-based compensation               5,571       5,571
Finance charges related to warrant issuance for surety bond backstop agreement               6,585       6,585
Net loss                 (210,820)     (210,820)
Ending balance at May. 31, 2022       $ 720       671,013 (766,131)     (94,398)
Ending balance (shares) at May. 31, 2022 35     720,028 443              
Issuance of stock for convertible note repayment       $ 17       3,983       4,000
Issuance of stock for convertible note repayment (in shares)       17,260                
Loss on induced conversion               5,312       5,312
Warrants issued in note offering               114       114
Stock issued for compensation       $ 3       982       985
Stock issued for compensation (in shares)       2,751                
Exercise of warrants, net of offering costs (in shares)                   9,700    
Make-whole shares related to private warrant exchange (in shares)       23                
Stock issued for private offerings     $ 157       $ 37,067       $ 37,224  
Stock issued for private offerings (in shares)     157,390             500 4,600  
Offering costs related to stock issuance               (1,760)       (1,760)
Conversion of preferred stock to common stock       $ 1       (1)        
Conversion of preferred stock to common stock (in shares) (1)     1,136                
Warrant exercises   $ 13   $ 2   $ 2,794   437   $ 2,807   439
Warrant exercises (in shares)   13,094   1,898                
Deemed dividend paid in common stock due to down round provision, recorded in additional paid-in capital       $ 6       (6)        
Deemed dividend paid in common stock due to down round provision recorded in additional paid-in capital (in shares)       5,154                
Preferred stock dividends accrued and paid in common stock Preferred stock dividends accrued and paid in common stock upon conversion               (1,331)       (1,331)
Preferred stock dividends accrued and paid in common stock Preferred stock dividends accrued and paid in common stock upon conversion (in shares)       (319)                
Reclassification of warrants from liability to equity classified               8,756       8,756
Stock-based compensation               3,290       3,290
Reclassification of prior period preferred stock dividends               (4,265) 4,265      
Finance charges related to warrant issuance for surety bond backstop agreement               4,885       4,885
Net loss                 (79,824)     (79,824)
Ending balance at May. 31, 2023       $ 919       $ 731,270 $ (841,690)     $ (109,501)
Ending balance (shares) at May. 31, 2023 34     919,053 443