General form of registration statement for all companies including face-amount certificate companies

Stockholders' Equity (Details) - Share-based Payment Arrangement, Option, Exercise Price Range

v3.21.2
Stockholders' Equity (Details) - Share-based Payment Arrangement, Option, Exercise Price Range - $ / shares
 9 Months Ended 12 Months Ended
May 31, 2019
May 31, 2018
Feb. 28, 2021
May 31, 2020
May 31, 2019
Jul. 19, 2019
Jul. 08, 2019
May 30, 2019
Nov. 14, 2018
Sep. 06, 2018
Aug. 14, 2018
May 30, 2018
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price           $ 1.10 $ 1.10   $ 0.75 $ 0.75 $ 0.75  
Number of warrants outstanding (in Shares) 54,818,985   54,410,145 54,835,145 54,818,985     54,818,985       4,495,750
Weighted average remaining contractual life     277 days 1 year 6 months                
Weighted average exercise price of outstanding warrants $ 0.53 $ 0.61 $ 0.53 $ 0.53 $ 0.53              
Number of warrants exercisable (in Shares)     54,410,145 54,835,145                
Weighted average exercise price of exercisable warrants     $ 0.53 $ 0.53                
Warrant Exercisable at $0.49 [Member]                        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price     $ 0.49 $ 0.49                
Number of warrants outstanding (in Shares)     33,465,110 33,465,110                
Weighted average remaining contractual life     9 months 1 year 6 months                
Weighted average exercise price of outstanding warrants     $ 0.49 $ 0.49                
Number of warrants exercisable (in Shares)     33,465,110 33,465,110                
Weighted average exercise price of exercisable warrants     $ 0.49 $ 0.49                
Warrants Exercisable at $0.50 [Member]                        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price     $ 0.50 $ 0.50                
Number of warrants outstanding (in Shares)     2,736,500 2,736,500                
Weighted average remaining contractual life     357 days 1 year 266 days                
Weighted average exercise price of outstanding warrants     $ 0.50 $ 0.50                
Number of warrants exercisable (in Shares)     2,736,500 2,736,500                
Weighted average exercise price of exercisable warrants     $ 0.50 $ 0.50                
Warrant Exercisable at $0.60 [Member]                        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price     $ 0.60 $ 0.60                
Number of warrants outstanding (in Shares)     17,500,000 17,500,000                
Weighted average remaining contractual life     9 months 1 year 6 months                
Weighted average exercise price of outstanding warrants     $ 0.60 $ 0.60                
Number of warrants exercisable (in Shares)     17,500,000 17,500,000                
Weighted average exercise price of exercisable warrants     $ 0.60 $ 0.60                
Warrant Exercisable at $0.75 [Member]                        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price     $ 0.75 $ 0.75                
Number of warrants outstanding (in Shares)     412,500 837,500                
Weighted average remaining contractual life     3 days 262 days                
Weighted average exercise price of outstanding warrants     $ 0.75 $ 0.75                
Number of warrants exercisable (in Shares)     412,500 837,500                
Weighted average exercise price of exercisable warrants     $ 0.75 $ 0.75                
Warrant Exercisable at $1.10 [Member]                        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]                        
Exercise Price     $ 1.10 $ 1.10                
Number of warrants outstanding (in Shares)     296,035 296,035                
Weighted average remaining contractual life     299 days 1 year 204 days                
Weighted average exercise price of outstanding warrants     $ 1.10 $ 1.10                
Number of warrants exercisable (in Shares)     296,035 296,035                
Weighted average exercise price of exercisable warrants     $ 1.10 $ 1.10