Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Property and Equipment and Related Accumulated Depreciation (Details)

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Property and Equipment - Schedule of Property and Equipment and Related Accumulated Depreciation (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 923 $ 901
Less: accumulated depreciation (275) (201)
Property and equipment, net 648 700
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 592 592
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 120 120
Laboratory Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 81 81
Computer Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 130 $ 108