Quarterly report pursuant to Section 13 or 15(d)

Property and equipment, net - Summary of property and equipment net (Detail)

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Property and equipment, net - Summary of property and equipment net (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 1,392 $ 1,393
Accumulated depreciation and amortization (1,069) (1,018)
Total property and equipment, net 323 375
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 14 14
Lab equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 1,328 1,329
Computer hardware [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 26 26
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 24 $ 24