Commitments and Contingencies - Additional Information (Detail)		1 Months Ended	3 Months Ended
	Oct. 24, 2017 USD ($)	Oct. 30, 2011 Patents	Sep. 29, 2017 USD ($)	Mar. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Other Commitments [Line Items]
Non-cancelable purchase commitments				$ 38,700,000
Maximum amount of potential future payments under the company's financial guarantees				3,600,000
Contract Manufacturing [Member]
Other Commitments [Line Items]
Bank Guarantees and Standby Letters of Credit				800,000
Credit Card Facility [Member]
Other Commitments [Line Items]
Bank Guarantees and Standby Letters of Credit				500,000
Indemnification [Member]
Other Commitments [Line Items]
Accrual for indemnification provisions				0
TVN [Member] | Guarantee Obligations [Member]
Other Commitments [Line Items]
Bank Guarantees and Standby Letters of Credit				1,400,000
Avid [Member]
Other Commitments [Line Items]
Loss Contingency, Patents Allegedly Infringed, Number | Patents		2
Estimated Litigation Liability			$ 6,000,000
Payments for litigation settlement	$ 2,500,000
Avid [Member] | Selling, General and Administrative Expenses [Member]
Other Commitments [Line Items]
Litigation Settlement, Expense			$ 6,000,000
Settled Litigation Payment Second Quarter of 2019 [Member] | Avid [Member]
Other Commitments [Line Items]
Estimated Litigation Liability, Noncurrent				1,500,000
Settled Litigation Payment Third Quarter of 2020 [Member] | Avid [Member]
Other Commitments [Line Items]
Estimated Litigation Liability, Noncurrent				2,000,000
Foreign Line of Credit [Member] | Performance Guarantee [Member] | Guarantee Obligations [Member]
Other Commitments [Line Items]
Line of Credit Facility, Current Borrowing Capacity					$ 2,000,000
Domestic Line of Credit [Member] | Performance Guarantee [Member] | Guarantee Obligations [Member]
Other Commitments [Line Items]
Bank Guarantees and Standby Letters of Credit					$ 2,200,000
Line of Credit Facility, Fair Value of Amount Outstanding				$ 0