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Note 4 - New Accounting Pronouncements (Details Textual) - USD ($)
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Operating Lease, Right-of-Use Asset $ 1,046,438  
Operating Lease, Liability, Total $ 1,046,000    
Accounting Standards Update 2016-02 [Member]      
Operating Lease, Right-of-Use Asset   $ 2,300,000  
Operating Lease, Liability, Total   $ 2,300,000