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Impairment of Long-Lived Assets - Additional Information (Detail) - Promissory Note [Member]
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
a
Impairment Of Long Lived Assets [Line Items]    
Principal amount of promissory note   $ 600
Value of real property $ 371  
Impairment of notes receivable 129  
Land    
Impairment Of Long Lived Assets [Line Items]    
Promissory note receivable term   5 years
Area of unimproved land owned by subsidiary | a   25
Promissory note maturity date   2019-10
Estimated market value of the note receivable $ 500