Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Components of Property and Equipment (Detail)

v3.19.1
Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]    
Total property and equipment, Gross $ 8,184,000 $ 2,364,000
Less: Accumulated depreciation (1,333,000) (412,000)
Total property and equipment, net 6,851,000 1,952,000
Laboratory Equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment, Gross 4,676,000 1,691,000
Less: Accumulated depreciation (108,000) (75,000)
Total property and equipment, net 99,000 162,000
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Total property and equipment, Gross 3,274,000 512,000
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Total property and equipment, Gross 89,000 85,000
Computer and Equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment, Gross $ 145,000 $ 76,000