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Balance Sheet Components - Intangible assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 19,455	$ 19,455
Less accumulated amortization	(9,674)	(6,314)
Intangible assets, net (excluding goodwill)	9,781	13,141
Goodwill	269	269
Intangible assets, net	10,050	13,410
Amortization expense	3,400	3,400	$ 100
Patents and exclusive technology rights
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 18,037	18,037
Finite-lived intangible asset, useful life	5 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 268	268
Finite-lived intangible asset, useful life	10 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,150	$ 1,150

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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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Useful life 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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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

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