Notes Receivable (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Receivables [Abstract]
Notes receivable, gross	$ 135,147,310		$ 135,147,310		$ 95,398,668
Less allowance for uncollectible accounts:
Balance at beginning of year			(11,133,146)	$ (3,461,837)	(3,461,837)
Provision	(10,456,447)	$ (4,480,679)	(32,880,630)	$ (9,615,268)	(19,587,918)
Charge-offs, net of recoveries totaling $4,479,376 and $648,799, respectively			27,108,580		11,916,609
Total allowance for uncollectible accounts	(16,905,196)		(16,905,196)		(11,133,146)
Recoveries			4,479,376		648,799
Notes receivable, net of allowance	118,242,114		118,242,114		84,265,522
Deferred Sezzle income	(4,536,345)		(4,536,345)		(3,458,222)
Notes receivable, net	$ 113,705,769		$ 113,705,769		$ 80,807,300