Note 15 - Fair Values Measurements and Disclosures - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Securities available for sale	$ 44,560,680	$ 46,984,907
Fair Value, Measurements, Recurring [Member]
Securities available for sale	44,560,680	46,984,907
Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	44,560,680	46,984,907
Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale	18,156,138	19,237,208
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	18,156,138	19,237,208
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	18,156,138	19,237,208
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	0	0
Residential Mortgage Backed Securities [Member]
Securities available for sale	26,404,542	27,747,699
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	26,404,542	27,747,699
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	0	0
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	26,404,542	27,747,699
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Securities available for sale	$ 0	$ 0