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Long-term debt - Summary of Long Term Debt (Parenthetical) (Detail)	12 Months Ended																					12 Months Ended
	Mar. 29, 2014	Mar. 29, 2014 Capital leasing arrangements [Member]	Mar. 30, 2013 Capital leasing arrangements [Member]	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Seven Percent [Member] USD ($) Installment	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Seven Percent [Member] CAD	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Seven Percent [Member] USD ($) Installment	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Seven Percent [Member] CAD	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Five Point Five Percent [Member] USD ($) Installment	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Five Point Five Percent [Member] CAD	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Five Point Five Percent [Member] USD ($) Installment	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Five Point Five Percent [Member] CAD	Mar. 29, 2014 Land and Building [Member] Capital leasing arrangements [Member] USD ($)	Mar. 29, 2014 Land and Building [Member] Capital leasing arrangements [Member] CAD	Mar. 30, 2013 Land and Building [Member] Capital leasing arrangements [Member] USD ($)	Mar. 30, 2013 Land and Building [Member] Capital leasing arrangements [Member] CAD	Mar. 29, 2014 Term Loan Facility [Member] Senior Secured Loans [Member]	Mar. 30, 2013 Term Loan Facility [Member] Senior Secured Loans [Member]	Mar. 29, 2014 Cash contribution [Member]	Mar. 30, 2013 Cash contribution [Member]	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member]	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member]	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period one [Member] USD ($)	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period one [Member] CAD	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period one [Member] USD ($)	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period one [Member] CAD	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period two [Member] USD ($)	Mar. 29, 2014 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period two [Member] CAD	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period two [Member] USD ($)	Mar. 30, 2013 Term Loan From Investissement Quebec Prime Plus Three Point Five Percent [Member] Repayment period two [Member] CAD
Debt Instrument [Line Items]
Secured long term debt	9.50%															8.77%	8.77%
Sale Leaseback transaction implicit annual interest												10.74%	10.74%	10.74%	10.74%
Capital repayment period																						20 months	20 months	20 months	20 months	40 months	40 months	40 months	40 months
Line of Credit Facility Expiration Date	Jun. 30, 2015															Aug. 31, 2018	Aug. 31, 2018
Capital Repayment amount																						$ 31,634	35,000	$ 31,634	35,000
Capital lease period												20 years	20 years	20 years	20 years	4 years	4 years
Repayments Of Debt And Capital Lease Obligations												151,629	167,762	151,629	167,762
Annual rate of prime plus				7.00%	7.00%	7.00%	7.00%	5.50%	5.50%	5.50%	5.50%									3.50%	3.50%
Number of installments				60	60	60	60	48	48	48	48
Capital repayments				75,319	83,333	75,319	83,333	188,298	208,333	188,298	208,333															49,711	55,000	49,711	55,000
Debt Instrument Interest Rate Stated Percentage Rate Range Minimum		6.00%	6.00%
Balance of term loan					5,000,000				5,208,000		7,708,000
Outstanding amount of repayment													13,444,000		13,981,000												0		660,000
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum		10.00%	10.00%
Interest on Cash advances																		11.00%	11.00%

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Capital Lease Term

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Interest Rate on Cash Advances

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Number Of Installment Of Term Loan

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The percentage points added to the reference rate to compute the variable rate on the lessor's capital lease (sales-type and direct financing leases).

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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Maximum contractual interest rate for funds borrowed, under the debt agreement.

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Minimum contractual interest rate for funds borrowed, under the debt agreement.

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Date the credit facility terminates, in CCYY-MM-DD format.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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The financing cost related to leases that have been recorded under the deposit method, as a financing or as a capital leases in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

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The amount of the monthly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

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