Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions (Details)

v3.21.4
Related Party Transactions (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Sep. 23, 2021
Nov. 30, 2021
Nov. 30, 2020
May 31, 2021
Related Party Transaction [Line Items]        
Common stock, shares outstanding   685,418   625,680
Debt instrument converted into equity value   $ 22,045 $ 16,922  
Private Warrant Exchange [Member]        
Related Party Transaction [Line Items]        
Shares issued during the period new issues shares   7,900    
Private Warrant Exchange [Member] | Minimum        
Related Party Transaction [Line Items]        
Exercise price of warrants, per share   $ 0.40    
Private Warrant Exchange [Member] | Maximum        
Related Party Transaction [Line Items]        
Exercise price of warrants, per share   $ 1.00    
Private Warrant Exchange, Non-Inducement Shares [Member]        
Related Party Transaction [Line Items]        
Shares issued during the period new issues shares   3,500    
Jordan G. Naydenov | Private Warrant Exchange [Member]        
Related Party Transaction [Line Items]        
Warrants to purchase common shares, shares 1,300      
Proceeds from issuance of common shares $ 700      
Jordan G. Naydenov | Private Warrant Exchange, Inducement Shares [Member]        
Related Party Transaction [Line Items]        
Warrants to purchase common shares, shares 600      
Jordan G. Naydenov | Private Warrant Exchange, Non-Inducement Shares [Member]        
Related Party Transaction [Line Items]        
Warrants to purchase common shares, shares 600