Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Indefinite-lived Intangible Assets [Line Items]
Total intangible assets, net	$ 719	$ 851
Amortization of intangible assets	$ 100	100	$ 100
Definite-lived intangible assets weighted-average amortization period	3 years 9 months
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2022	$ 100
2023	100
2024	100
2025	100
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Trademarks and other indefinite-lived intangible assets	245	245
Patents
Finite-Lived Intangible Assets [Line Items]
Patent costs	2,330	2,330
Accumulated amortization	(1,856)	(1,724)
Total definite-lived intangible assets, net	$ 474	$ 606

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.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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