Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Changes in Stockholders' (Deficit) Equity

v3.20.2
Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Preferred Stock [Member]
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning balance at May. 31, 2019 $ (8,914)   $ 330   $ 220,120 $ (229,364)
Beginning balance, shares at May. 31, 2019   95 329,554 159    
Issuance of stock for convertible note conversions 1,005   $ 3   1,002  
Issuance of stock for convertible note conversions , shares     3,014      
Dividends on Series C preferred shares (110)         (110)
Stock-based compensation 581       581  
Net loss (16,164)         (16,164)
Proceeds from registered direct offering 2,256   $ 6   2,250  
Proceeds from registered direct offering, shares     5,640      
Offering costs related to registered direct offering, value (260)       (260)  
Inducement interest expense—public warrant tender offers 2,431       2,431  
Legal fees in connection with equity offerings (16)       (16)  
Proceeds from public warrant tender offers 11,900   $ 45   11,855  
Proceeds from public warrant tender offers (shares)     45,376      
Offering costs related to public warrant tender offers (1,059)       (1,059)  
Proceeds from Series C preferred offering 1,754 $ 2     1,754  
Offering costs related to Series C preferred offering (198)       (198)  
Ending balance at Aug. 31, 2019 (6,794)   $ 384   238,460 (245,638)
Ending balance, shares at Aug. 31, 2019   97 383,584 159    
Beginning balance at May. 31, 2019 (8,914)   $ 330   220,120 (229,364)
Beginning balance, shares at May. 31, 2019   95 329,554 159    
Ending balance at May. 31, 2020 (2,481)   $ 519   351,711 (354,711)
Ending balance, shares at May. 31, 2020   109 519,261 286    
Issuance of stock for convertible note conversions 9,537   $ 2   9,535  
Issuance of stock for convertible note conversions , shares     2,119      
Issuance of legal settlement shares     $ 4   (4)  
Issuance of legal settlement shares , shares     4,000      
Exercise of stock options 39       39  
Exercise of stock options, shares     100      
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    
Conversion of Series B Convertible preferred shares to common stock, shares   (5) 50      
Private warrant exchange 7,804   $ 17   7,787  
Private warrant exchange , shares     16,544      
Exercise of warrants 13,469   $ 19   13,450  
Exercise of warrants , shares     19,134      
Cashless exercise of warrants     $ 9   (9)  
Cashless exercise of warrants , shares     8,794      
Inducement interest expense related to private warrant exchange 3,345       3,345  
Offering costs related to private warrant exchange (364)       (364)  
Dividend declared and paid on Series B preferred shares (243)         (243)
Dividends on Series C preferred shares (207)         (207)
Dividends on Series D preferred shares (213)         (213)
Stock-based compensation 2,086       2,086  
Net loss (30,832)         (30,832)
Ending balance at Aug. 31, 2020 $ 2,768   $ 570   $ 388,404 $ (386,206)
Ending balance, shares at Aug. 31, 2020   104 570,325 442