Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Intangible and Other Assets (Details Textual)

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Note 3 - Intangible and Other Assets (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Feb. 29, 2024
Mar. 31, 2024
Sep. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2023
Amortization of Intangible Assets     $ 683,000   $ 0 $ 1,288,000 $ 26,000  
Intangible Assets, Net (Excluding Goodwill)   $ 5,603,000           $ 6,636,000
Finite-Lived Intangible Assets, Gross   20,103,000           21,649,000
Finite-Lived Intangible Assets, Accumulated Amortization   14,500,000           $ 15,013,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal   144,000   $ (0)        
Minehut [Member]                
Intangible Assets, Net (Excluding Goodwill) $ 475,000              
Finite-Lived Intangible Assets, Gross 1,671,000              
Finite-Lived Intangible Assets, Accumulated Amortization 1,196,000              
Minehut [Member]                
Disposal Group, Including Discontinued Operation, Consideration 619,000 $ 1,000,000            
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 144,000              
Minehut [Member] | Prepaid Expenses and Other Current Assets [Member]                
Disposal Group, Including Discontinued Operation, Consideration 224,000              
Minehut [Member] | Other Noncurrent Assets [Member]                
Disposal Group, Including Discontinued Operation, Consideration $ 395,000