Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Intangible Assets (Details Textual)

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Note 3 - Intangible Assets (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Feb. 29, 2024
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Amortization of Intangible Assets   $ 604,000 $ 1,316,000 $ 1,286,000 $ 2,604,000  
Intangible Assets, Net (Excluding Goodwill)   5,158,000   5,158,000   $ 6,636,000
Finite-Lived Intangible Assets, Gross   20,262,000   20,262,000   21,649,000
Finite-Lived Intangible Assets, Accumulated Amortization   15,104,000   15,104,000   15,013,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal   0 0 144,000 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          
Developed Technology Rights [Member]            
Finite-Lived Intangible Assets, Gross   3,931,000   3,931,000   $ 3,931,000
Developed Technology Rights [Member] | Bannerfy Acquisition [Member]            
Finite-Lived Intangible Assets, Accumulated Amortization     785,000   785,000  
Impairment of Intangible Assets, Finite-Lived         2,284,000  
Finite-Lived Intangible Assets, Period Increase (Decrease)         (3,069,000)  
Minehut [Member]            
Disposal Group, Including Discontinued Operation, Consideration 619,000          
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 144,000          
Disposal Group, Including Discontinued Operation, Consideration, Receivable 619,000          
Royalty Income, Nonoperating   $ 154,000   $ 163,000    
Minehut [Member] | Maximum [Member]            
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 1,000,000          
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          
Cost of Sales [Member]            
Amortization of Intangible Assets     $ 5,000   $ 31,000