Note 4 - Securities (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 0 | $ 0 | $ 0 | $ 0 |
| Proceeds from Sale of Available-for-sale Securities | 1,495,000 | $ 0 | 1,495,000 | $ 0 |
| Available-for-sale Securities, Gross Realized Gains | $ 365 | $ 365 | ||