Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Statement Of Other Comprehensive Income [Abstract] | |||
| Unrealized holding gains (losses) arising during the period, deferred taxes (benefits) | $ 145,606 | $ 1,305,107 | $ (2,167,273) |
| Reclassification adjustment for impairment loss included in net income, deferred tax benefits | 0 | 0 | 6,197 |
| Reclassification adjustment for gains included in net income, deferred taxes | $ 412,730 | $ 459,212 | $ 243,383 |