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Consolidated Statements of Operations and Comprehensive Loss (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Income Statement [Abstract] |  |
Reclassification adjustment for realized losses included in net loss, tax expense | $ 0 | $ 0

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- Definition Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive income for unrealized loss realized upon the write-down of available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 + Details
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