Leases - Schedule of Lease Expense (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finance lease cost
Amortization of right-of-use assets	$ 266,747	$ 134,472	$ 540,853	$ 364,401
Interest on lease liabilities	56,372	62,026	164,044	187,574
Operating lease cost	357,914	318,005	993,924	954,015
Total	$ 681,033	$ 514,503	$ 1,698,821	$ 1,505,990