Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Advertising Expense $ 131,000 $ 22,000 $ 379,000 $ 73,000  
Number of Reportable Segments     1    
Goodwill, Ending Balance 46,125,000   $ 46,125,000   $ 2,565,000
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount 17,200,000   17,200,000    
Payments of Financing Costs, Total $ 215,000 $ 434,000 $ 215,000 $ 1,203,000  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)     5,041,000   4,470,000
Computer Software, Intangible Asset [Member]          
Finite-Lived Intangible Asset, Useful Life (Year)     3 years    
Minimum [Member]          
Finite-Lived Intangible Asset, Useful Life (Year)     3 years    
Maximum [Member]          
Finite-Lived Intangible Asset, Useful Life (Year)     10 years    
Transferred at Point in Time [Member]          
Percentage of Revenue 23.00% 65.00% 29.00% 55.00%  
Transferred over Time [Member]          
Percentage of Revenue 77.00% 35.00% 71.00% 45.00%