Operating Leases - Summary of Supplemental other Information Related to Operating Leases Balance Sheet (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease obligations (see Note 7 and 9)	$ 1,631,867	$ 1,824,840
Operating lease right-of-use assets	$ 844,222	$ 903,825
Weighted-average remaining lease term (years)	3 years 7 months 6 days	4 years 3 months 18 days
Weighted-average discount rate	7.20%	7.30%