ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of accumulated other comprehensive income (loss) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 147,576,211	$ 128,468,076
Other comprehensive income (loss) before reclassification	232,969
Net current period other comprehensive (loss) income	938,504	7,520,432
Ending balance	139,659,123	147,576,211
Unrealized gain (loss) in investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	17,158
Other comprehensive income (loss) before reclassification	(6,516,824)
Net current period other comprehensive (loss) income	(6,516,824)
Ending balance	(6,499,666)	17,158
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net current period other comprehensive (loss) income	232,969
Ending balance	232,969
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(289,814)
Other comprehensive income (loss) before reclassification	179,142
Amounts reclassified from other comprehensive (loss) income	166,356
Net current period other comprehensive (loss) income	345,498
Ending balance	55,684	(289,814)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(272,656)	(273,013)
Other comprehensive income (loss) before reclassification	(6,104,713)
Amounts reclassified from other comprehensive (loss) income	166,356
Net current period other comprehensive (loss) income	(5,938,357)
Ending balance	$ (6,211,013)	$ (272,656)