Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Changes Stockholders' Deficit

v3.23.3
Consolidated Statements of Changes Stockholders' Deficit - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock
Series C Convertible Preferred Stock
Preferred Stock
Common Stock
Series C Convertible Preferred Stock
Common Stock
Private Equity Offering
Common Stock
Treasury Stock
Additional Paid-in Capital
Series C Convertible Preferred Stock
Additional Paid-in Capital
Private Equity Offering
Additional Paid-in Capital
Accumulated Deficit
Private Equity Offering
Total
Beginning balance at May. 31, 2022         $ 720       $ 671,013 $ (766,131)   $ (94,398)
Beginning balance (shares) at May. 31, 2022   35     720,028 443            
Stock issued for compensation         $ 1       344     345
Stock issued for compensation (in shares)         879              
Stock issued for private offerings       $ 85       $ 17,459     $ 17,544  
Stock issued for private offerings (in shares)       85,378                
Issuance costs related to stock issued for private offerings                 (6,289)     (6,289)
Conversion of preferred stock to common stock     $ 1       $ (1)          
Conversion of preferred stock to common stock (in shares) (1)   1,136                  
Warrant exercises         $ 1       263     264
Warrant exercises (in shares)         657              
Deemed dividend paid in common stock due to down round provision, recorded in additional paid-in capital         $ 5       (5)      
Deemed dividend paid in common stock due to down round provision recorded in additional paid-in capital (in shares)         4,620              
Dividends accrued on Series C and D convertible preferred stock                 (384)     (384)
Reclassification of warrants from liability to equity classified                 8,601     8,601
Stock-based compensation                 996     996
Reclassification of prior period preferred stock dividends                 (4,265) 4,265    
Net loss                   (20,991)   (20,991)
Ending balance at Aug. 31, 2022         $ 813       687,732 (782,857)   (94,312)
Ending balance (shares) at Aug. 31, 2022   34     812,698 443            
Beginning balance at May. 31, 2023         $ 919       731,270 (841,690)   (109,501)
Beginning balance (shares) at May. 31, 2023   34     919,053 443            
Issuance of stock for convertible note repayment         $ 8       1,492     1,500
Issuance of stock for convertible note repayment (in shares)         8,661              
Loss on induced conversion                 2,004     2,004
Warrants issued in note offering                 170     170
Stock issued for compensation         $ 1       154     155
Stock issued for compensation (in shares)         686              
Warrant exercises         $ 3       297     300
Warrant exercises (in shares)         3,000              
Dividends accrued on Series C and D convertible preferred stock                 (373)     (373)
Reclassification of warrants from liability to equity classified                 79     79
Stock-based compensation                 348     348
Net loss                   (11,571)   (11,571)
Ending balance at Aug. 31, 2023         $ 931       $ 735,441 $ (853,261)   $ (116,889)
Ending balance (shares) at Aug. 31, 2023   34     931,400 443