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Note 13 - Leases - Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Cash payments for operating leases $ 1,471,879 $ 4,407,269
New operating lease assets obtained in exchange for operating lease liabilities $ 1,437,622