Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Debt instrument London interbank offered rate.

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- Definition

Derivative of instruments not designated as hedging instruments description of terms.

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Financial Instruments [Line Items]

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Subparagraph (SX 210.5-02(22))
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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 25, 2016	Sep. 30, 2015
Miconex [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Financial Instruments [Line Items]
Non-Designated Derivatives, description	The Miconex interest swap to convert the variable interest rates on Miconex debt to fixed rates with a total notional amount of $0.3 million is not designated as a hedging instrument. The Company recognizes gains and losses on this contract, as well any related costs in interest and other income (expense), net.
Maximum [Member]
Financial Instruments [Line Items]
Effective portion of cash flow hedge before tax effect	$ 100,000
Cash flow hedge, expected to be reclassified from AOCI into earnings	100,000
Interest Rate Swap [Member] \| Miconex [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Financial Instruments [Line Items]
Derivative instrument, notional amount	$ 300,000
East West and City National Bank [Member] \| Interest Rate Swap [Member]
Financial Instruments [Line Items]
Derivative instrument, notional amount			$ 20,000,000
Credit Agreement [Member] \| Interest Rate Swap [Member] \| Term Loan Credit Facility [Member]
Financial Instruments [Line Items]
Debt instrument LIBOR rate			0.99%
Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Term Loan Credit Facility [Member]
Financial Instruments [Line Items]
Debt instrument variable interest rate	0.78%
Derivatives in Cash Flow Hedging Relationship [Member]
Financial Instruments [Line Items]
Gains (losses) recognized in income on derivatives that are excluded from effectiveness testing and ineffective portion	$ 0	$ 0
Derivatives in Cash Flow Hedging Relationship [Member] \| East West and City National Bank [Member] \| Term Loan Credit Facility [Member]
Financial Instruments [Line Items]
Debt instrument interest rate	3.74%
Outstanding amounts	$ 23,300,000
Derivatives in Cash Flow Hedging Relationship [Member] \| East West and City National Bank [Member] \| Interest Rate Swap [Member] \| Term Loan Credit Facility [Member]
Financial Instruments [Line Items]
Derivative instrument, notional amount	$ 12,400,000