Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 825	$ 578
Less: Accumulated depreciation and amortization	(193)	(77)
Property and equipment, net	$ 632	501
Lab Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Gross property and equipment	$ 415	173
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Gross property and equipment	$ 31	31
Leasehold Improvement [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Gross property and equipment	$ 379	$ 374