v3.19.3
Property and Equipment - Summary of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,177 $ 1,416
Less accumulated depreciation (779) (407)
Total 1,398 1,009
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 48 48
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 273 146
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 343 122
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,513 $ 1,100