v3.26.1
Note 12 - Segment Reporting - Disaggregation of Revenue (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Revenue $ 522,000 $ 592,000 $ 1,229,000 $ 1,214,000  
Unrealized net loss (gain) on digital assets 2,295,000 (31,000) 97,000 (31,000) $ 3,519,000
Realized net loss on sale of digital assets 166,000 0 114,000 0  
Segment net profit 274,000 228,000 744,000 477,000  
Amortization expense     2,000 0  
Loss before income tax expense (3,289,000) (605,000) (1,592,000) (1,270,000)  
Operating Segments [Member]          
Revenue 522,000 592,000 1,229,000 1,214,000  
Labor and labor-related [1] 71,000 71,000      
Cash digital asset transaction fees 6,000        
Advisory fees 18,000        
Stock-based expense 82,000        
Cost of Revenue 171,000 295,000      
Unrealized net loss (gain) on digital assets 2,295,000 (31,000)      
Realized net loss on sale of digital assets 166,000        
Segment net profit (2,287,000) 251,000      
Other segment items [2]   6,000      
Operating Segments [Member] | Digital Assets [Member]          
Revenue 105,000 2,000      
Operating Segments [Member] | Network Services [Member]          
Revenue 400,000 574,000      
Operating Segments [Member] | Video Collaboration Service [Member]          
Revenue 15,000 11,000      
Operating Segments [Member] | Professional and Other Services [Member]          
Revenue 2,000 5,000      
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]          
Corporate expenses [3] 1,013,000 903,000      
Amortization expense 2,000        
Interest income (13,000) (47,000)      
Digital Assets [Member]          
Segment net profit 99,000   179,000    
Digital Assets [Member] | Operating Segments [Member]          
Revenue 105,000 2,000 191,000 2,000  
Labor and labor-related [1] 0 0      
Cash digital asset transaction fees 6,000        
Advisory fees 18,000        
Stock-based expense 82,000        
Cost of Revenue 0 0      
Unrealized net loss (gain) on digital assets 2,295,000 (31,000)      
Realized net loss on sale of digital assets 166,000        
Segment net profit $ (2,462,000) $ 33,000      
Segment net profit margin % (2345.00%) 1650.00%      
Other segment items [2]   $ 0      
Digital Assets [Member] | Operating Segments [Member] | Digital Assets [Member]          
Revenue $ 105,000 2,000      
Digital Assets [Member] | Operating Segments [Member] | Network Services [Member]          
Revenue 0 0      
Digital Assets [Member] | Operating Segments [Member] | Video Collaboration Service [Member]          
Revenue 0 0      
Digital Assets [Member] | Operating Segments [Member] | Professional and Other Services [Member]          
Revenue 0 0      
Managed Services [Member] | Operating Segments [Member]          
Revenue 415,000 497,000 836,000 1,005,000  
Labor and labor-related [1] 71,000 65,000      
Cash digital asset transaction fees 0        
Advisory fees 0        
Stock-based expense 0        
Cost of Revenue 168,000 295,000      
Unrealized net loss (gain) on digital assets 0 0      
Realized net loss on sale of digital assets 0        
Segment net profit $ 176,000 $ 137,000      
Segment net profit margin % 42.00% 28.00%      
Other segment items [2]   $ 0      
Managed Services [Member] | Operating Segments [Member] | Digital Assets [Member]          
Revenue $ 0 0      
Managed Services [Member] | Operating Segments [Member] | Network Services [Member]          
Revenue 400,000 481,000      
Managed Services [Member] | Operating Segments [Member] | Video Collaboration Service [Member]          
Revenue 13,000 11,000      
Managed Services [Member] | Operating Segments [Member] | Professional and Other Services [Member]          
Revenue 2,000 5,000      
Collaboration Products [Member] | Operating Segments [Member]          
Revenue 2,000 93,000 $ 202,000 $ 207,000  
Labor and labor-related [1] 0 6,000      
Cash digital asset transaction fees 0        
Advisory fees 0        
Stock-based expense 0        
Cost of Revenue 3,000 0      
Unrealized net loss (gain) on digital assets 0 0      
Realized net loss on sale of digital assets 0        
Segment net profit $ (1,000) $ 81,000      
Segment net profit margin % (50.00%) 87.00%      
Other segment items [2]   $ 6,000      
Collaboration Products [Member] | Operating Segments [Member] | Digital Assets [Member]          
Revenue $ 0 0      
Collaboration Products [Member] | Operating Segments [Member] | Network Services [Member]          
Revenue 0 93,000      
Collaboration Products [Member] | Operating Segments [Member] | Video Collaboration Service [Member]          
Revenue 2,000 0      
Collaboration Products [Member] | Operating Segments [Member] | Professional and Other Services [Member]          
Revenue $ 0 $ 0      
[1] Includes direct labor costs (including sales and marketing costs), employment taxes, employee benefits, workers’ compensation, and office expenses.
[2] Other segment items include other income and expenses, net, interest expense, certain professional services, and miscellaneous taxes and fees.
[3] Represents general and administrative costs, less the amounts allocated to the segments for labor and benefits, general liability insurance, professional services, property taxes, and interest income.