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Note 6 - Other Assets - Carrying Amounts of Other Assets (Details) - USD ($)
$ in Thousands
Nov. 30, 2023
Nov. 30, 2022
Interest receivable $ 99 $ 62
Prepaid expenses 1,125 1,298
Other Assets, Current 1,470 2,235
Other long-term assets:    
Marketable equity securities 2,102 1,845
Office equipment 141 19
Other Assets, Noncurrent 3,000 2,803
Other Noncurrent Assets [Member]    
Other long-term assets:    
Right-of-use assets 757 939
Related Party [Member]    
Accounts receivable 43 301
Nonrelated Party [Member]    
Accounts receivable $ 203 $ 574