Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 2,321	$ 2,453
Other current liabilities	438	434
Operating lease liabilities	2,053	2,199
Total operating lease liabilities	2,491	2,633
Property, plant, and equipment	81	81
Accumulated depreciation	(18)	(12)
Property, plant, and equipment, net	63	69
Other current liabilities	13	12
Other long-term liabilities	54	57
Total finance lease liabilities	$ 67	$ 69