Related Parties - Additional Information (Details) - USD ($)	1 Months Ended		12 Months Ended
	Sep. 30, 2018	Jul. 31, 2013	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Share-based award, stock options granted	1,995,660
Incentive units vesting period			4 years
Yale University | Minimum
Related Party Transaction [Line Items]
Payment for annual license maintenance royalty until the first commercial sale of product		$ 75,000
Yale University | Office of Cooperative Research
Related Party Transaction [Line Items]
Payments for license maintenance royalty fee, reimbursable patent costs and sublicense fee			$ 288,517	$ 152,603
Consulting Agreement | Dr. Craig Crews
Related Party Transaction [Line Items]
Payment for consulting service			176,110	150,000
Monthly consulting services fee			$ 20,833
Consulting agreement term			3 years
Share-based award, stock options granted			235,150
Exercise price of stock options			$ 16.00
Incentive units vesting period			3 years
Corporate Sponsored Research Agreement (SRA) | Yale University
Related Party Transaction [Line Items]
Total research payments			$ 851,161	$ 404,632
Related party agreement, description			In July 2016, the Company entered into a Corporate Sponsored Research Agreement (SRA) with Yale University, under the direction of Professor Crews, which was amended in April 2018. The amended SRA extended the agreement until April 2021 and amended the scope of work. The amended SRA requires quarterly payments of $250,000 through the end of the agreement. The total payments made under the SRA for 2018 and 2017 were $851,161 and $404,632, respectively.
Agreement expiration period			2018-04
Amended Corporate Sponsored Research Agreement | Yale University
Related Party Transaction [Line Items]
Quarterly research payments			$ 250,000