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Note 12 - Leases (Details Textual) - USD ($)
 3 Months Ended
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets, Noncurrent, Excluding Property, Plant, and Equipment $ 2,858,999   $ 1,935,119
Liabilities, Current, Total 32,062,745   $ 30,208,712
Operating Lease, Expense 379,000    
Operating Lease, Payments $ 361,000    
Accounting Standards Update 2016-02 [Member]      
Assets, Noncurrent, Excluding Property, Plant, and Equipment   $ 2,800,000  
Liabilities, Current, Total   1,300,000  
Liabilities, Noncurrent, Total   $ 1,500,000