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INCOME TAXES - Unrecognized tax benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Activity of unrecognized tax benefits |  |
Balance at the beginning of the year | $ 14,978 | $ 13,577
Additions on tax positions for the current year | 2,800 | 3,225
Additions on tax positions from prior years | 1,002 | 2,582
Reduction in tax positions from prior year | (866) | (4,406)
Balance at the end of the year | 17,914 | 14,978
Deferred income tax assets: |  |
Tax credit carryforwards | 5,960 | 5,934
Net operating loss carryforwards | 3,311 | 3,678
Customer advances | 10,008 | 3,443
Allowance for doubtful accounts | 3,615 | 2,994
Inventory reserve | 11,754 | 11,026
Inventory capitalization | 424 | 481
Accrued liabilities | 2,877 | 2,956
Operating lease liabilities | 7,732 | 8,043
Stock and deferred compensation | 12,624 | 12,224
Other assets | 721 | 1,164
Total deferred income tax assets | 59,026 | 51,943
Valuation allowance | (9,365) | (8,433)
Net deferred income tax assets | 49,661 | 43,510
Deferred income tax liabilities: |  |
Depreciation | (5,543) | (5,860)
Amortization of intangible assets | (12,096) | (21,617)
Withholding tax on unrepatriated foreign earnings | (7,834) | (6,851)
Operating lease ROU assets | (7,223) | (7,931)
State transition tax | (1,754) | (1,754)
Other liabilities | (4,814) | (1,824)
Total deferred income tax liabilities | (39,264) | (45,837)
Net deferred income tax liability | $ 10,397 |
Net deferred income tax liability |  | $ (2,327)

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