Balance Sheet Accounts - Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 25,281	$ 23,940
Less: Accumulated depreciation and amortization	(9,018)	(7,522)
Property, plant and equipment, net	16,263	16,418
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,010	8,045
Building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,456	6,443
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,952	3,614
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,472	2,472
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,031	2,101
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	802	802
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	397	463
Construction in Process
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 161	$ 0