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Income Taxes - Components of Loss before Provision for (Benefit from) Income Taxes (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]            
Domestic         $ (7,470) $ (7,185)
Foreign         0 0
Loss before (benefit from) provision for income taxes $ (8,318) $ (2,104) $ (21,541) $ (2,913) $ (7,470) $ (7,185)