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Schedule of Principal Items Comprising Deferred Income Taxes (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
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Income Tax Disclosure [Abstract] |  |
Inventory capitalization | $ 5,267 | $ 6,338
Non-deductible accruals | 1,125 | 1,705
Accrued employee benefits | 7,614 | 9,738
Net-operating loss and credit carryforwards | 48,738 | 53,048
Share-based compensation expense | 7,925 | 12,386
Other | 3,242 | 1,761
Valuation allowances | (21,797) | (42,562)
Total deferred income tax assets | 52,114 | 42,414
Tax over book accumulated depreciation | (24,174) | (7,803)
Intangible assets | (24,649) | (38,108)
Tax on unremitted earnings | (13,090) | (6,210)
Convertible debt | (11,376) |
Other | (4,020) | (2,615)
Total deferred income tax liabilities | (77,309) | (54,736)
Net deferred income taxes | $ (25,195) | $ (12,322)

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