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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Income Tax Disclosure [Abstract] |  |  |
Federal statutory income tax rate (percent) | 21.00% |  |
Tax at federal statutory rate (benefit) | $ 2,139 | $ (25,303) | $ (5,433)
State income tax, net of federal benefit | 917 | 202 | 517
Release of foreign valuation allowance |  |  | (2,794)
Release of US valuation allowance – Tax reform |  |  | (4,680)
Establishment of Irish valuation allowance |  |  | 8,642
US valuation allowance change – deferred tax movement | (9,387) | 2,414 | (4,444)
Research and development credits | (2,423) | (4,947) | (6,598)
Tax impact of foreign earnings | 11,979 | 6,925 | 9,817
Foreign withholding taxes | 828 | 762 | 745
Stock based compensation | 1,162 | 4,349 | 2,436
Goodwill amortization | 1,467 | 331 | 834
Nondeductible officer compensation | 1,496 | 862 | 713
Nondeductible meals and entertainment | 71 | 364 | 517
AMT credit monetization |  | (22) |
Gain on transfer of intellectual property ("IP") |  | 19,819 |
Other |  | 597 | (293)
Provision (benefit) for income taxes | $ 8,249 | $ 6,353 | $ (21)

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