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Note 3 - Concentration of Credit Risk (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
Sep. 30, 2022
USD ($)
Sep. 30, 2021
Dec. 31, 2021
USD ($)
Cash and Cash Equivalents, at Carrying Value, Total $ 11,875,921   $ 11,875,921   $ 16,651,371
Cash Equivalents, at Carrying Value, Total 7,100,000   7,100,000   7,000,000.0
Cash, Uninsured Amount $ 3,700,000   $ 3,700,000   $ 8,600,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member]          
Number Of Major Customers 1 2 1 2  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]          
Concentration Risk, Percentage 44.60%   28.60%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer A [Member]          
Concentration Risk, Percentage   15.60%   12.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer B [Member]          
Concentration Risk, Percentage   11.80%   11.70%  
Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Number Of Major Customers     1   2
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]          
Concentration Risk, Percentage     34.40%    
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Customers [Member]          
Concentration Risk, Percentage         50.00%