Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Changes in Stockholders' (Deficit) Equity

v3.21.2
Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock [Member]
Common Stock
Private Warrant Exchange [Member]
Common Stock
Private Placement [Member]
Common Stock
Treasury Stock
Additional Paid-in Capital [Member]
Private Warrant Exchange [Member]
Additional Paid-in Capital [Member]
Private Placement [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit
Private Warrant Exchange [Member]
Private Placement [Member]
Total
Beginning balance at May. 31, 2020       $ 519       $ 351,711 $ (354,711)     $ (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
Dividend declared and paid                 (243)     (243)
Dividends accrued                 (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       388,404 (386,206)     2,768
Ending balance, shares at Aug. 31, 2020 104     570,325 442              
Beginning balance at May. 31, 2021       $ 626       489,650 (511,294)     (21,018)
Beginning 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             1,300    
Inducement interest expense               9       9
Dividends accrued                 (420)     (420)
Stock-based compensation               2,597       2,597
Warrant exercises, value       $ 1       502       503
Warrant exercises, shares       668                
Issuance of common stock upon vesting of stock based compensation awards, value       $ 1       (1)        
Issuance of common stock upon vesting of stock based compensation awards, 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
Equity instruments issued in legal settlement, shares                       1,600
Net loss                 (30,939)     $ (30,939)
Ending balance at Aug. 31, 2021       $ 644       $ 516,816 $ (542,653)     $ (25,193)
Ending balance, shares at Aug. 31, 2021 96     644,120 443