Notes Payable and Other Liabilities - Summary of Long-term Portion of Outstanding Notes Payable as well as Other Long-Term Liabilities (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Notes Payable And Other Liabilities Disclosure [Abstract]
Lease obligation, long-term portion (see Note 6)	$ 1,468,124	$ 1,484,679
Operating lease, liability, statement of financial position [extensible list]	us-gaap:OtherNoncurrentLiabilitiesMember	us-gaap:OtherNoncurrentLiabilitiesMember
Conditional economic incentive grants	$ 250,000	$ 250,000
Other	110,319	130,196
Total other long-term liabilities	$ 1,828,443	$ 1,864,875