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ACCRUED WARRANTY - Warranty Obligations (Detail) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Warranty accrual, beginning balance $ 3,840 $ 3,601
Accruals for warranties issued during the period 3,839 3,373
Changes in liability for pre-existing warranties during the period 95 (343)
Settlements made during the period (3,446) (2,647)
Warranty accrual, ending balance $ 4,328 $ 3,984