Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 2,547	$ 1,900
Other current liabilities	421
Operating lease liabilities	2,307
Total operating lease liabilities	2,728	$ 2,000
Property, plant, and equipment	81
Accumulated depreciation	(10)
Property, plant, and equipment, net	71
Other current liabilities	13
Other long-term liabilities	60
Total finance lease liabilities	$ 73