Leases - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) Term	Mar. 31, 2018 USD ($)	Mar. 05, 2019 ft²	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 01, 2018 ft²	Mar. 06, 2018 ft²
Lessee Lease Description [Line Items]
Operating lease right of use asset	$ 400,000			$ 400,000
Operating lease liability, current	164,629
Operating lease liability, non-current	$ 245,242
Operating lease discount rate	8.00%
Operating lease, weighted average remaining lease term	2 years 9 months 18 days
Operating lease, cash payment made	$ 28,000
Operating lease expense	37,000	$ 19,000
Minimum future lease commitment					$ 400,596
Newton Lease
Lessee Lease Description [Line Items]
Minimum future lease commitment	$ 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