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Note 2 - Summary of Significant Accounting Policies (Details Textual)
9 Months Ended
Sep. 30, 2025
USD ($)
shares
Sep. 30, 2024
shares
Dec. 31, 2024
USD ($)
Jan. 01, 2024
USD ($)
Accounts Receivable, after Allowance for Credit Loss, Current | $ $ 2,522,013   $ 1,432,470 $ 2,100,000
Accounts Receivable, Allowance for Credit Loss, Current | $ 220,000   20,000.00 160,000
Contract with Customer, Liability, Current | $ 70,602   $ 148,054 $ 226,316
Contract with Customer, Liability, Revenue Recognized | $ $ 96,781      
Number of Operating Segments 2      
Restricted Stock Units (RSUs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 106,797 7,325    
Warrant [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,710,369 174,807    
Share-Based Payment Arrangement, Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0 55    
Series F Convertible Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,143,977      
Convertible Preferred Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)   183,259    
Convertible Debt Securities [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)   242,707