Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Lease	Sep. 30, 2018 USD ($)	Jan. 01, 2019 USD ($)
Operating Leased Assets [Line Items]
Operating lease right-of-use-assets	$ 2,919		$ 2,919
Operating lease, liability	$ 3,010		$ 3,010
Number of leases | Lease			2
Operating lease, discount rate	7.00%		7.00%
Operating lease, weighted average remaining lease term	8 years		8 years
operating lease expense	$ 100		$ 400
Operating lease , cash payment	100		300
Rent expense		$ 100		$ 300
Operating lease right-of-use-assets amortization	$ 100		$ 245
Office Building [Member]
Operating Leased Assets [Line Items]
Lease expiration period			2027
Manufacturing Facility [Member]
Operating Leased Assets [Line Items]
Lease expiration period			2021
ASU 2016-02 [Member]
Operating Leased Assets [Line Items]
Operating lease right-of-use-assets					$ 3,200
Operating lease, liability					$ 3,200