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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.

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Borrowing Arrangements - Additional Information (Detail) € in Millions	3 Months Ended	6 Months Ended
	Mar. 27, 2015	Jun. 29, 2018 USD ($)	Jun. 29, 2018 EUR (€)	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Debt Instrument, covenant description		The Credit Agreement requires the Company to maintain certain financial covenants including a consolidated fixed charge coverage ratio (as defined in the Credit Agreement) of at least 1.25 to 1.00 starting with the end of the first quarter of fiscal 2015 and a consolidated leverage ratio (as defined in the Credit Agreement) no greater than 3.5 to 1.00 starting with the end of the first quarter of fiscal 2015. The Credit Agreement also includes other customary affirmative and negative covenants. In December 2015, the Credit Agreement was amended to add a covenant requiring the Company to maintain a minimum cash balance of $35.0 million at the end of each quarter. The Company was in compliance with all covenants for the quarter ended June 29, 2018.
Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio for the next fiscal year	1.25%
Required cash balance		$ 35,000,000
First Quarter [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio for first quarter of next fiscal year	3.50%
Term Loan Credit Facility [Member]
Debt Instrument [Line Items]
Base rate interest		3.98%
Outstanding amounts		$ 7,400,000
Term Loan Credit Facility [Member] \| Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative instrument, notional amount				$ 20,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding amounts		39,900,000
Term Loan and Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding amount of borrowing classified as long-term debt		47,200,000
Unamortized debt issuance costs		$ 100,000
Credit Agreement [Member] \| Term Loan Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		2.00%	2.00%
Outstanding amounts		$ 7,400,000
Credit Agreement [Member] \| Term Loan Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate		1.98%
Credit Agreement [Member] \| Term Loan Credit Facility [Member] \| Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		2.99%	2.99%
Derivative instrument, notional amount		$ 4,700,000
Debt instrument LIBOR rate				0.99%
Credit Agreement [Member] \| Term Loan Credit Facility [Member] \| Interest Rate Swap [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate		1.98%
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Base rate interest		4.25%
Credit Agreement [Member] \| U.S. [Member]
Debt Instrument [Line Items]
Credit facility expiration date		Feb. 02, 2019
Credit Agreement [Member] \| Czech Republic [Member]
Debt Instrument [Line Items]
Credit facility expiration date		Mar. 31, 2020
Bank Debt [Member]
Debt Instrument [Line Items]
Outstanding amount of borrowing classified as long-term debt		$ 54,900,000
Bank Debt [Member] \| U.S. [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available borrowings under revolving loan		$ 100,000
Bank Debt [Member] \| Czech Republic [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		1.30%	1.30%
Bank Debt [Member] \| Czech Republic [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available borrowings under revolving loan		$ 2,000,000	€ 1.8
Bank Debt [Member] \| Czech Republic [Member] \| Revolving Credit Facility [Member] \| FDS [Member]
Debt Instrument [Line Items]
Outstanding amounts		$ 7,600,000	€ 6.5