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Related Party Transactions - Additional Information (Detail) - Management [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Related Party Transaction [Line Items]          
Legal services to these law firms $ 33 $ 117 $ 213 $ 252  
Amount payable to law firms $ 27   $ 27   $ 47