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Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]        
Amortization expense $ 29 $ 29 $ 87 $ 87