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Note 13 - Leases (Details Textual) - USD ($)
 3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Assets, Noncurrent, Excluding Property, Plant, and Equipment $ 756,051 $ 1,165,295  
Liabilities, Current, Total 21,459,544 27,524,405  
Liabilities, Noncurrent, Total 2,830,969 $ 2,670,171  
Operating Lease, Expense 251,000    
Operating Lease, Payments $ 251,000    
Accounting Standards Update 2016-02 [Member]      
Assets, Noncurrent, Excluding Property, Plant, and Equipment     $ 2,800,000
Liabilities, Current, Total     1,100,000
Liabilities, Noncurrent, Total     $ 1,700,000