Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 7,208,828	$ 30,492,151
Reversal of net unrealized loss on securities to provision for credit loss	652,880
Unrealized gain on bond purchase commitments	431,879
Comprehensive income	40,494,158	70,822,786
Accumulated Other Comprehensive Income (Loss) [Member]
Reversal of net unrealized gains on sale of securities	(1,408,804)
Reversal of net unrealized loss on securities to provision for credit loss	652,880
Unrealized gain on securities	33,609,375	$ 40,330,635
Unrealized gain on bond purchase commitments	431,879
Commitments [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized gain on bond purchase commitments	$ 431,879