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Commitments and Contingencies - Narrative (Details)	3 Months Ended
	Jun. 30, 2018 USD ($)	Dec. 28, 2015 firm
Other Commitments [Line Items]
Number of venture firms invested in Lifesize | firm		3
Parent guarantee for purchase obligation of third party contract manufacturer
Other Commitments [Line Items]
Maximum amount of the guarantees	$ 3,800,000
Guarantees outstanding	1,200,000
Indemnification agreement
Other Commitments [Line Items]
Amount accrued for indemnification provisions	$ 0
Minimum
Other Commitments [Line Items]
Product warranty term	1 year
Maximum
Other Commitments [Line Items]
Product warranty term	5 years

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- Definition

Number of Venture Firms that invested in the Company's discontinued operations

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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-Topic 450
-SubTopic 20
-Section 50
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