Note 3 - Loans Leases Receivable - Changes in Accretable Yield (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Balance at the beginning of the period	$ (5,816,439)	$ (7,071,690)	$ (6,471,207)	$ (9,309,920)
Accretion recognized	622,967	1,662,359	1,277,735	3,900,589
Balance at the end of the period	(5,193,472)	(5,409,331)	(5,193,472)	(5,409,331)
Performing Loans
Balance at the beginning of the period	(5,659,543)	(6,944,074)	(6,280,075)	(9,115,614)
Accretion recognized	608,119	1,618,603	1,228,651	3,790,143
Balance at the end of the period	(5,051,424)	(5,325,471)	(5,051,424)	(5,325,471)
PCI Loans
Balance at the beginning of the period	(156,896)	(127,616)	(191,132)	(194,306)
Accretion recognized	14,848	43,756	49,084	110,446
Balance at the end of the period	$ (142,048)	$ (83,860)	$ (142,048)	$ (83,860)