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Note 12 - Leases (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets, Noncurrent, Excluding Property, Plant, and Equipment $ 2,437,665 $ 2,437,665   $ 1,935,119
Liabilities, Current, Total 28,811,925 28,811,925   $ 30,208,712
Operating Lease, Expense 379,000 758,000    
Operating Lease, Payments $ 361,000 $ 722,000    
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