Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v3.22.2.2
Related Party Transactions (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 12 Months Ended
May 31, 2021
Sep. 30, 2021
Jul. 31, 2021
Nov. 30, 2020
May 31, 2022
May 31, 2021
Related Party Transaction [Line Items]            
Number of shares to be sold         7,900  
Private Warrant Exchange [Member]            
Related Party Transaction [Line Items]            
Number of shares to be sold 36,200         35,800
Warrants to purchase common shares, shares         7,900  
Private Warrant Exchange, Non-Inducement Shares [Member]            
Related Party Transaction [Line Items]            
Number of shares to be sold 400          
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   $ 0.7        
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        
Christopher Recknor [Member]            
Related Party Transaction [Line Items]            
Number of shares to be sold       700    
Stock price, in dollars per share       $ 1.50    
Proceeds from issuance of common shares       $ 1.0    
Immediate Family Member of Management or Principal Owner [Member]            
Related Party Transaction [Line Items]            
Related party transactions, amount     $ 0.1   $ 1.7 $ 0.9
Accounts Payable, Related Parties         $ 0.3