Note 15 - Other Expenses - Other Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Directors compensation	$ 231,479	$ 221,072	$ 216,770
Outside services	73,966	132,500	75,000
Legal expense	261,088	251,051	275,657
Deposit expense	110,897	139,234	77,862
Office supplies	105,780	94,189	74,798
Telephone	173,160	158,434	141,674
Postage	138,864	141,529	155,901
Insurance	118,483	115,430	113,341
Supervisory exam	55,849	53,951	51,433
Accounting	207,652	210,939	171,759
Organization dues	155,121	145,709	137,723
Loan expense	361,389	271,739	397,438
Contributions	60,000	60,000	52,500
ATM expense	170,455	152,581	238,744
Other operating	637,961	673,565	491,941
	$ 2,862,144	$ 2,821,923	$ 2,672,541