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Balance Sheet Components - Intangible Assets, Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 05, 2017	Mar. 31, 2018	Mar. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Payments to Acquire Intangible Assets		$ 14,034	$ 0
STMicro | License fees
Finite-Lived Intangible Assets [Line Items]
Payments to Acquire Intangible Assets	$ 17,000	13,500
Payments to Acquire Intangible Assets in Calender Year 2017	10,100
Payments to Acquire Intangible Assets in Calender Year 2018	6,700
Payments to Acquire Intangible Assets in Calender Year 2019	$ 200
Finite-Lived Intangible Assets, Net		$ 16,400

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- Definition

Payments to Acquire Intangible Assets in Calendar Year 2019

+ References

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- Definition

Payments to Acquire Intangible Assets in Calender Year 2018

+ References

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- Definition

Payments to Acquire Intangible Assets in Calender year 2017

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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