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Note 13 - Leases (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets, Noncurrent, Excluding Property, Plant, and Equipment $ 1,554,000 $ 1,554,000   $ 1,856,390
Liabilities, Current, Total 27,610,396 27,610,396   30,208,712
Liabilities, Noncurrent, Total 2,571,303 2,571,303   $ 2,296,393
Operating Lease, Expense 216,000 938,000    
Operating Lease, Payments $ 216,000 $ 938,000    
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