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Stockholders' Deficit - Schedule of Stock-Based Compensation Expenses (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2019 | Jun. 30, 2018
Total stock-based compensation expense | $ 456,000 | $ 1,086,000 | $ 1,356,000 | $ 1,492,000 | $ 1,944,000 | $ 255,000
Research and Development [Member] |  |  |  |  |  |
Total stock-based compensation expense | 54,000 | 225,000 | 162,000 | 256,000 | 314,000 | 96,000
General and Administrative [Member] |  |  |  |  |  |
Total stock-based compensation expense | $ 402,000 | $ 861,000 | $ 1,194,000 | $ 1,236,000 |  |
Selling and Administrative [Member] |  |  |  |  |  |
Total stock-based compensation expense |  |  |  |  | $ 1,630,000 | $ 159,000

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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