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Pre- Tax loss Jurisdictions (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Pre tax Income Loss [Line Items]      
Domestic $ (46,016) $ (16,819) $ (40,068)
Foreign 0 0 0
Pre-tax loss $ (46,016) $ (16,819) $ (40,068)