13. INCOME TAX EXPENSE (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Tax expense at federal statutory rates	$ 4,306,709	$ 3,843,048	$ 2,959,056
Increases (decreases) in taxes resulting from:
State income taxes, net of federal benefit	5,882	8,087	8,659
Partially tax-exempt income	(41,135)	(46,348)	(54,529)
Tax-exempt income	(216,999)	(222,672)	(190,192)
LIH and historic credits	(896,063)	(700,882)	(506,742)
Deferred Tax Asset Valuation Allowance - reversal			396,440
Other	(59,088)	4,840	(112,714)
Total Income Tax Expense	$ 3,099,305	$ 2,886,072	$ 2,293,136