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Summary of Significant Accounting Policies (Schedule of Amounts Included in Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Jun. 30, 2020
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Receivables [Abstract] |  |
Contract assets | $ 347 | $ 3,443
Contract liabilities | (3,232) | (558)
Ending balance | $ (2,885) | $ 2,885

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