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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2022
Jun. 30, 2017
Schedule of Income Taxes [Line Items]      
Deferred income tax valuation allowance $ 8,373   $ 11,120
Net operating loss carry-forward $ 14,600    
Net operating loss carryforward expiration year 2023 through 2043    
For tax years beginning after March 31, 2018 and before January 1, 2022 [Member]      
Schedule of Income Taxes [Line Items]      
Percentage of AMT credit refundable 50.00%    
For the 2021 tax year [Member]      
Schedule of Income Taxes [Line Items]      
Percentage of AMT credit refundable 100.00%    
Later Than [Member] | Scenario, Forecast [Member]      
Schedule of Income Taxes [Line Items]      
Federal alternative minimum tax, tax credits   $ 305