Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019 USD ($) extension_option	Dec. 31, 2018 USD ($)	Sep. 30, 2014
Operating Leased Assets [Line Items]
Operating Lease, Weighted Average Discount Rate, Percent	14.70%
Operating Leases, Rent Expense	$ 664,098	$ 627,732
Accrued Vacated Office Facility Costs	$ 400,000
Woburn Lease [Member]
Operating Leased Assets [Line Items]
Operating lease, renewal term	5 years
Woburn Lease [Member] | Month Rent [Member]
Operating Leased Assets [Line Items]
Operating Lease, Payments	$ 13,846
Waltham Lease [Member]
Operating Leased Assets [Line Items]
Operating lease, term of contract			7 years
Operating lease, number of extension options | extension_option	1
Operating lease, renewal term	5 years
Waltham Lease [Member] | Month Rent [Member]
Operating Leased Assets [Line Items]
Operating Lease, Payments	$ 41,074