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Lines of Credit - Additional information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2020
Sep. 30, 2019
Line of Credit Facility [Line Items]    
Line of credit outstanding $ 3,000  
CIBC Bank USA [Member]    
Line of Credit Facility [Line Items]    
Line of credit maximum borrowing capacity   $ 7,500
Line of credit outstanding $ 3,000  
Debt instrument stated interest rate 2.50%  
Line of credit maturity Sep. 30, 2020