Composition of Certain Balance Sheet Items - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Proper and equipment and finance lease right-of-use asset, before accumulated depreciation and amortization	$ 2,446	$ 2,378
Less accumulated depreciation	(1,566)	(1,328)
Property and equipment, net	880	1,050
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	304	304
Software
Property, Plant and Equipment [Line Items]
Property and equipment	1,609	1,541
Leasehold improvements
Property, Plant and Equipment [Line Items]
Leasehold improvements	$ 533	$ 533