SCHEDULE II (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1,292	$ 837	$ 1,314
Charged to Expense	956	548	(129)
Charged to Other Accounts	0	0	0
Deduction from Reserves	(550)	(93)	(348)
Balance at End of Year	1,698	1,292	837
Warranty reserves
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	4,478	4,679	4,546
Charged to Expense	11,507	4,185	3,821
Charged to Other Accounts	37,453	0	0
Deduction from Reserves	(25,818)	(4,386)	(3,688)
Balance at End of Year	27,620	4,478	4,679
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	20,190	21,797	42,562
Charged to Expense	(2,186)	(1,607)	(4,602)
Charged to Other Accounts	36,555	0	(16,163)
Deduction from Reserves	0	0	0
Balance at End of Year	$ 54,559	$ 20,190	$ 21,797