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Intangible Assets, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets, net | $ 851 | $ 983 |
Amortization of intangible assets | $ 100 | 100 | $ 100
Definite-lived intangible assets weighted-average amortization period | 4 years 9 months |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2021 | $ 100 |  |
2022 | 100 |  |
2023 | 100 |  |
2024 | 100 |  |
2025 | 100 |  |
Patent costs |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Patent costs | 2,330 | 2,330 |
Accumulated amortization | (1,724) | (1,592) |
Total definite-lived intangible assets, net | 606 | 738 |
Trademark costs |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Trademarks and other indefinite-lived intangible assets | $ 245 | $ 245 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + 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 (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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