Other Long-Term Liabilities - Summary of Other Long-Term Liabilities (Detail) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Lease obligation, long-term portion (see Note 6)	$ 1,276,715	$ 1,468,124
Conditional economic incentive grants	250,000	250,000
Other	90,435	110,319
Total other long-term liabilities	$ 1,617,150	$ 1,828,443