Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Millions
|3 Months Ended||9 Months Ended|
Sep. 30, 2017
Sep. 30, 2018
|Commitments and Contingencies Disclosure [Abstract]|
|Operating leases expense||$ 1.0||$ 1.2|
Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.
No definition available.