Quarterly report pursuant to Section 13 or 15(d)

Supplemental Disclosures of Non-cash Operating, Investing and Financing Activities (Details Textual)

v3.21.2
Supplemental Disclosures of Non-cash Operating, Investing and Financing Activities (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 15, 2021
Apr. 09, 2021
Apr. 08, 2020
Jan. 06, 2020
Feb. 29, 2020
Jan. 31, 2020
Aug. 31, 2021
Aug. 31, 2021
Aug. 31, 2020
Nov. 30, 2020
Operating Lease, Right-of-Use Asset             $ 1,148 $ 1,148   $ 1,200
Operating Lease, Liability, Total             $ 1,067 $ 1,067    
Preferred Stock, Par or Stated Value Per Share (in dollars per share)             $ 0.001 $ 0.001   $ 0.001
Conversion of Stock, Shares Converted (in shares) 4,636,649                  
Conversion of Stock, Shares Issued (in shares) 695,498                  
Payments of Debt Issuance Costs               $ 83 $ (0)  
Stock Repurchased and Retired During Period, Shares (in shares)           369,999        
Stock Issued During Period, Value, Purchase of Assets                 $ 693  
Convertible Noteholders [Member]                    
Class of Warrant Or Right, Granted in Period (in shares)           49,842        
Accrued Interest Satisfied By Issuance of Warrants           $ 100        
Common Stock [Member]                    
Stock Repurchased and Retired During Period, Shares (in shares)             485 485 370,000  
Stock Issued During Period, Shares, Purchase of Assets (in shares)                 386,681  
Stock Issued During Period, Value, Purchase of Assets                 $ 0  
Patents [Member] | Common Stock [Member]                    
Stock Issued During Period, Shares, Purchase of Assets (in shares)       386,681            
Stock Issued During Period, Value, Purchase of Assets       $ 700            
Warrants Issued to Consultants [Member]                    
Class of Warrant Or Right, Granted in Period (in shares)         15,000       15,000  
Value of Warrants Issued for Marketing Services         $ 10          
The Notes [Member]                    
Debt Conversion, Original Debt, Amount     $ 6,950              
The Notes [Member] | Warrants [Member]                    
Debt Conversion, Converted Instrument, Amount     $ 200              
Series A Preferred Stock [Member]                    
Dividends Payable, Amount Per Share (in dollars per share)   $ 750                
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.001                
Dividends Payable   $ 1,000                
Conversion of Stock, Shares Converted (in shares)   4,636,649                
Conversion of Stock, Shares Issued (in shares)   695,498                
Preferred Class A [Member] | The Notes [Member]                    
Debt Conversion, Converted Instrument, Shares Issued (in shares)     1,391              
Debt Conversion, Converted Instrument, Amount     $ 11,590              
Payments of Debt Issuance Costs     $ 30              
Operating Lease Entered into During the Nine Months Ended August 31, 2021 [Member]                    
Operating Lease, Right-of-Use Asset             $ 100 $ 100