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Commitments and Contingencies - Narrative (Details) | Sep. 30, 2017 USD ($) | Dec. 28, 2015 firm
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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 | 1,400,000 |
Indemnification agreement |  |
Other Commitments [Line Items] |  |
Amount accrued for indemnification provisions | $ 0 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
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- Details
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