Other Long-Term Liabilities - Summary of Other Long-Term Liabilities (Detail) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Lease obligation, long-term portion (see Note 6)	$ 1,374,055	$ 1,468,124
Conditional economic incentive grants	250,000	250,000
Other	95,383	110,319
Total other long-term liabilities	$ 1,719,438	$ 1,828,443