Note 19 - Leases (Details Textual) $ in Thousands  | 
6 Months Ended | 
|---|---|
| 
 May 31, 2022  
USD ($) 
 | |
| Wilmington/Andover, Massachusetts [Member] | |
| Operating Lease, Monthly Base Rent Expense | $ 15 | 
| Lease Expiration Date | Feb. 29, 2028 | 
| SOUTH AFRICA | |
| Operating Lease, Monthly Base Rent Expense | $ 5 | 
| Lease Expiration Date | Nov. 30, 2024 | 
| Fort Wayne, Indiana [Member] | |
| Operating Lease, Monthly Base Rent Expense | $ 8 | 
| Lease Expiration Date | Jul. 31, 2025 | 
| Las Vegas, Nevada [Member] | |
| Operating Lease, Monthly Base Rent Expense | $ 4 | 
| Lease Expiration Date | Aug. 31, 2022 | 
| X | ||||||||||
- Definition Represents the amount of base rent per month under an operating lease. No definition available. 
  | 
| X | ||||||||||
- Definition Date which lease or group of leases is set to expire, in YYYY-MM-DD format. No definition available. 
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| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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