Property Plant and Equipment - Summary of Property and Equipment at Cost and Related Accumulated Depreciation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 6,659	$ 6,271
Less accumulated depreciation and amortization	(1,222)	(1,010)
Total property and equipment, net	5,437	5,261
Furniture And Fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, at cost	1,611	1,611
Computer Equipment And Software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, at cost	345	289
Manufacturing Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, at cost	439	416
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 4,264	$ 3,955