Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Revenue From Contracts With Customers (Details Textual)

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Note 2 - Revenue From Contracts With Customers (Details Textual)
6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Accounts Receivable, Allowance for Credit Loss, Ending Balance $ 0   $ 0
Contract with Customer, Liability, Revenue Recognized $ 845,463 $ 409,786  
Number of Subcontracts with Significant Financing Component 1    
Subcontract, Payments Receivable Under Regular Terms, Percent 90.00%    
Subcontract, Payments Receivable Deferred Until Specific Deliverable is Met, Percent 10.00%    
Subcontract, Payments Receivable, Interest Rate 4.50%