Leases - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Term	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 05, 2019 ft²	Jan. 01, 2019 USD ($)	Apr. 01, 2018 ft²	Mar. 06, 2018 ft²
Lessee Lease Description [Line Items]
Operating lease right of use asset	$ 500,000		$ 500,000		$ 200,000	$ 400,000		$ 400,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent		us-gaap:OtherAssetsNoncurrent
Operating lease liability, current	$ 227,872		$ 227,872
Operating lease liability, non-current	$ 264,330		$ 264,330
Operating lease discount rate	8.00%		8.00%
Operating lease, weighted average remaining lease term	2 years 6 months		2 years 6 months
Operating lease, cash payment made	$ 67,000		$ 145,000
Operating lease expense	56,000	$ 36,000	142,000	$ 96,000
Operating lease liability	$ 492,202		$ 492,202					$ 400,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities		us-gaap:OtherLiabilities
ASU 2016-02
Lessee Lease Description [Line Items]
Operating lease liability, current					100,000	200,000
Operating lease liability, non-current					$ 100,000	$ 200,000
Newton Lease | Newton, Massachusetts
Lessee Lease Description [Line Items]
Lease agreement date			Mar. 06, 2018
Lease commencement date			Oct. 01, 2018
Square feet of office space leased | ft²										2,760
Amended Newton Lease | Newton, Massachusetts
Lessee Lease Description [Line Items]
Lease agreement date			Mar. 05, 2019
Lease commencement date			Jun. 01, 2019
Square feet of office space leased | ft²							1,600
Lease expiration date			May 31, 2022
Bend Lease | Oregon
Lessee Lease Description [Line Items]
Lease agreement date			Apr. 01, 2018
Lease commencement date			Apr. 01, 2018
Square feet of office space leased | ft²									2,288
Lease expiration date			Mar. 31, 2021
Maximum additional periods of option to extend the bend term | Term			2
Option to extend bend term for duration period			3 years