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Summary of Business and Significant Accounting Policies - Deferred Financing Costs (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Summary of Business and Significant Accounting Policies    
Deferred financing costs $ 981 $ 981
Accumulated amortization of deferred financing costs 981 740
Amortization of deferred financing costs 241 239
Advertising Expense $ 150 $ 70