Note 18 - New Accounting Pronouncements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset		$ 9,052,941	$ 9,655,304
Reclassifications of Amounts Within AOCI to Retained Earnings Due to Tax Reform	$ 31,818
Operating Lease, Liability, Total		$ 9,105,503	9,655,304
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			9,655,304	$ 481,130
Operating Lease, Liability, Total			$ 9,655,304	$ 481,130
Accounting Standards Update 2018-02 [Member] | New Accounting Pronouncement, Early Adoption, Effect [Member]
Reclassifications of Amounts Within AOCI to Retained Earnings Due to Tax Reform	$ 31,818