Note 3 - Investment Securities (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Proceeds from Sale of Available-for-sale Securities | $ 25,209,851 | $ 28,273,634 | $ 13,620,956 |
| Available-for-sale Securities, Gross Realized Gains | 391,976 | 207,896 | 67,601 |
| Available-for-sale Securities, Gross Realized Losses | 6,753 | 196,316 | 45,666 |
| Held-to-maturity Securities, Sold Security, Realized Gain (Loss) | (23,046) | $ 1,800 | |
| Security Owned and Pledged as Collateral, Fair Value | $ 144,853,885 | $ 133,754,087 | |
| Number of Investment Securities with Unrealized Losses | 108 | ||
| Depreciated Debt Securities with Unrealized Losses | 2.63% | ||
| Number of Asset Backed Securities Owned | 1 | ||
| Number of Issuances of Trust Preferred Securities | 1 | ||