ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of accumulated other comprehensive income (loss) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 139,086,259	$ 145,025,932	$ 139,659,123	$ 147,576,211
Comprehensive income (loss)	665,000	(2,458,737)	1,411,532	(3,416,239)
Ending balance	139,198,478	140,460,794	139,198,478	140,460,794
Unrealized Gain and Losses on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(6,613,758)	(2,689,802)	(6,499,666)	(289,814)
Other comprehensive (loss) income before reclassification	(505,111)	(4,142,333)	(619,203)	(6,542,321)
Comprehensive income (loss)	(505,111)	(4,142,333)	(619,203)	(6,542,321)
Ending balance	(7,118,869)	(6,832,135)	(7,118,869)	(6,832,135)
Dervatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	117,432		232,969
Other comprehensive (loss) income before reclassification	330,016		214,479
Comprehensive income (loss)	330,016		214,479
Ending balance	447,448		447,448
Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	39,138	58,747	55,684	17,158
Other comprehensive (loss) income before reclassification	(16,546)	41,589	(33,092)	83,178
Comprehensive income (loss)	(16,546)	41,589	(33,092)	83,178
Ending balance	22,592	100,336	22,592	100,336
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(6,457,188)	(2,631,055)	(6,211,013)	(272,656)
Other comprehensive (loss) income before reclassification	(191,641)	(4,100,744)	(437,816)	(6,459,143)
Comprehensive income (loss)	(191,641)	(4,100,744)	(437,816)	(6,459,143)
Ending balance	$ (6,648,829)	$ (6,731,799)	$ (6,648,829)	$ (6,731,799)