Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Changes in Stockholders' (Deficit) Equity

v3.21.4
Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock
Common Stock
Private Warrant Exchange [Member]
Common Stock
Private Equity Offering
Common Stock
Treasury Stock
Additional Paid-in Capital
Private Warrant Exchange [Member]
Additional Paid-in Capital
Private Equity Offering
Additional Paid-in Capital
Accumulated Deficit
Private Warrant Exchange [Member]
Private Equity Offering
Total
Beginning balance at May. 31, 2020       $ 519       $ 372,301 $ (375,301)     $ (2,481)
Beginning balance, shares at May. 31, 2020 109     519,261 286              
Issuance of stock for convertible note repayment, value       $ 2       9,535       9,537
Issuance of stock for convertible note, shares       2,119                
Stock issued via offering, tender or placement, value   $ 17       $ 7,787       $ 7,804    
Stock issued via offering, tender or placement, shares   16,544                    
Offering costs, stock and warrants           (364)       (364)    
Inducement interest expense           3,345   3,345   3,345   3,345
Dividend declared and paid                 (243)     (243)
Dividends accrued on preferred stock                 (420)     (420)
Stock-based compensation               2,086       2,086
Warrant exercises, value       $ 28       13,441       13,469
Warrant exercises, shares       27,928                
Stock issued for incentive compensation and tendered for income tax               828       828
Stock issued for incentive compensation and tendered for income tax , shares       323 156              
Stock option exercises, value               (39)       (39)
Stock option exercises, shares       100                
Equity instruments issued in legal settlement, value       $ 4       (4)        
Equity instruments issued in legal settlement, shares       4,000                
Conversion of Series B preferred stock to common stock, shares (5)     50                
Net loss                 (30,832)     (30,832)
Ending balance at Aug. 31, 2020       $ 570       408,994 (406,796)     2,768
Ending balance, shares at Aug. 31, 2020 104     570,325 442              
Beginning balance at May. 31, 2020       $ 519       372,301 (375,301)     (2,481)
Beginning balance, shares at May. 31, 2020 109     519,261 286              
Net loss                       (66,257)
Ending balance at Nov. 30, 2020       $ 590       435,512 (442,636)     (6,534)
Ending balance, shares at Nov. 30, 2020 104     590,279 442              
Beginning balance at May. 31, 2020       $ 519       372,301 (375,301)     (2,481)
Beginning balance, shares at May. 31, 2020 109     519,261 286              
Net loss                       (111,463)
Ending balance at Feb. 28, 2021               472,029 (488,253)     (15,795)
Beginning balance at May. 31, 2020       $ 519       372,301 (375,301)     (2,481)
Beginning balance, shares at May. 31, 2020 109     519,261 286              
Inducement interest expense               13,922       13,922
Net loss                 (157,230)     (157,230)
Ending balance at May. 31, 2021       $ 626       512,796 (534,440)     (21,018)
Ending balance, shares at May. 31, 2021 96     626,123 443              
Beginning balance at Aug. 31, 2020       $ 570       408,994 (406,796)     2,768
Beginning balance, shares at Aug. 31, 2020 104     570,325 442              
Issuance of stock for convertible note repayment, value       $ 4       11,549       11,553
Issuance of stock for convertible note, shares       4,293                
Stock issued via offering, tender or placement, value   $ 13 $ 1     4,583 $ 999     4,596 $ 1,000  
Stock issued via offering, tender or placement, shares   12,480 667                  
Inducement interest expense           4,217   4,217   4,217   4,217
Dividends accrued on preferred stock                 (415)     (415)
Stock-based compensation               3,423       3,423
Warrant exercises, value       $ 2       1,737       1,739
Warrant exercises, shares       2,504                
Stock option exercises, value               10       10
Stock option exercises, shares       10                
Net loss                 (35,425)     (35,425)
Ending balance at Nov. 30, 2020       $ 590       435,512 (442,636)     (6,534)
Ending balance, shares at Nov. 30, 2020 104     590,279 442              
Inducement interest expense               5,360       5,360
Net loss                 (45,206)     (45,206)
Ending balance at Feb. 28, 2021               472,029 (488,253)     (15,795)
Ending balance at May. 31, 2021       $ 626       512,796 (534,440)     (21,018)
Ending balance, shares at May. 31, 2021 96     626,123 443              
Issuance of stock for convertible note repayment, value       $ 12       18,483       18,495
Issuance of stock for convertible note, shares       11,816                
Stock issued via offering, tender or placement, value   $ 1 $ 3     774 2,869     775 2,872  
Stock issued via offering, tender or placement, shares   1,327 2,872                  
Inducement interest expense           528   528   $ 528   528
Dividends accrued on preferred stock                 (420)     (420)
Stock-based compensation               2,597       2,597
Warrant exercises, value       $ 1       502       503
Warrant exercises, shares       668                
Stock issued for incentive compensation and tendered for income tax       $ 1       (1)        
Stock issued for incentive compensation and tendered for income tax , shares       1,014                
Stock option exercises, value               189       189
Stock option exercises, shares       300                
Equity instruments issued in legal settlement, value               1,744       1,744
Net loss                 (31,458)     (31,458)
Ending balance at Aug. 31, 2021       $ 644       540,481 (566,318)     (25,193)
Ending balance, shares at Aug. 31, 2021 96     644,120 443              
Beginning balance at May. 31, 2021       $ 626       512,796 (534,440)     $ (21,018)
Beginning balance, shares at May. 31, 2021 96     626,123 443              
Stock issued via offering, tender or placement, shares                   7,900    
Equity instruments issued in legal settlement, shares                       1,600
Net loss                       $ (68,062)
Ending balance at Nov. 30, 2021       $ 686       589,971 (603,353)     (12,696)
Ending balance, shares at Nov. 30, 2021 36     685,861 443              
Beginning balance at Aug. 31, 2021       $ 644       540,481 (566,318)     (25,193)
Beginning balance, shares at Aug. 31, 2021 96     644,120 443              
Issuance of stock for convertible note repayment, value       $ 8       11,505       11,513
Issuance of stock for convertible note, shares       8,162                
Stock issued via offering, tender or placement, value   $ 7 $ 25     4,608 27,282     $ 4,615 27,307  
Stock issued via offering, tender or placement, shares   6,593 25,178                  
Offering costs, stock and warrants             $ (1,418)       $ (1,418)  
Dividend declared and paid       35                
Inducement interest expense           $ 4,704       $ 4,704    
Dividend declared and paid               17 (17)      
Dividends accrued on preferred stock                 (414)     (414)
Stock-based compensation               2,060       2,060
Warrant exercises, value       $ 1       532       533
Warrant exercises, shares       963                
Stock option exercises, value               200       200
Stock option exercises, shares       210                
Conversion of Stock, Amount Issued       $ 1               1
Conversion of Series B preferred stock to common stock, shares (60)     600                
Net loss                 (36,604)     (36,604)
Ending balance at Nov. 30, 2021       $ 686       $ 589,971 $ (603,353)     $ (12,696)
Ending balance, shares at Nov. 30, 2021 36     685,861 443