Balance Sheet Accounts - Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 24,226	$ 23,940
Less: Accumulated depreciation and amortization	(7,991)	(7,522)
Property, plant and equipment, net	16,235	16,418
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,502	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	3,532	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	1,996	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	$ 466	$ 463