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SCHEDULE II (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Allowance for doubtful accounts      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 1,698 $ 1,292 $ 837
Charged to Expense 301 956 548
Charged to Other Accounts 0 0 0
Deduction from Reserves (1,075) (550) (93)
Balance at End of Year 924 1,698 1,292
Warranty reserves      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 27,620 4,478 4,679
Charged to Expense 2,134 11,507 4,185
Charged to Other Accounts 0 37,453 0
Deduction from Reserves (7,886) (25,818) (4,386)
Balance at End of Year 21,868 27,620 4,478
Deferred tax asset valuation allowance      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 54,559 20,190 21,797
Charged to Expense (2,545) (2,186) (1,607)
Charged to Other Accounts 1,751 36,555 0
Deduction from Reserves 0 0 0
Balance at End of Year $ 53,765 $ 54,559 $ 20,190