14. EMPLOYEE BENEFITS (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amount recognized in the Consolidated Balance Sheet
Prepaid benefit cost	$ 4,360,788	$ 4,799,051	$ 4,434,917
Unfunded pension benefit obligation under ASC 325-960	(4,804,083)	(4,065,491)	(3,528,487)
Deferred taxes	1,633,388	1,382,267	1,199,686
Amount recognized in accumulated other comprehensive income (loss)
Net loss	(4,861,211)	(4,137,855)	(3,616,087)
Prior service cost	57,128	72,364	87,600
Amount recognized	(4,804,083)	(4,065,491)	(3,528,487)
Deferred Taxes	1,633,388	1,382,267	1,199,686
Amount recognized in accumulated comprehensive income	(3,170,695)	(2,683,224)	(2,328,801)
Prepaid benefit detail
Benefit obligation	(12,475,045)	(10,944,658)	(10,777,415)
Fair value of assets	12,031,750	11,678,218	11,683,845
Unrecognized net actuarial loss	4,861,211	4,137,855	3,616,087
Unrecognized prior service cost	(57,128)	(72,364)	(87,600)
Prepaid (accrued) benefits	4,360,788	4,799,051	4,434,917
Components of net periodic benefit cost Comprehensive income (loss)
Service cost	631,874	648,334	501,032
Interest cost	452,896	410,944	377,706
Expected return on plan assets	(854,414)	(838,818)	(698,252)
Amortization of prior service cost	(15,236)	(15,236)	(15,236)
Recognized net acutuarial (gain)loss	223,143	180,642	36,110
Net periodic benefit cost	438,263	385,866	201,360
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Net (gain) loss	723,356	521,768	2,130,632
Amortization of prior service cost	15,236	15,236	15,236
Total recognized in other comprehensive income	738,592	537,004	2,145,868
Total recognized in net periodic benefit cost and other	1,176,855	922,870	2,347,228
Additional disclosure information
Accumulated benefit obligation	8,788,626	7,601,249	7,543,340
Vested benefit obligation	$ 8,780,087	$ 7,539,365	$ 7,408,014
Discount rate used for net pension cost	4.25%	4.00%	5.00%
Discount rate used for disclosure	4.00%	4.25%	4.00%
Expected return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	3.00%	3.00%	3.00%
Average remaining service -years)	13 years	13 years	14 years