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Long-term debt - Summary of Long Term Debt (Parenthetical) (Detail) | 12 Months Ended |  |  | 12 Months Ended
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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Imputed Interest Rate -URI http://asc.fasb.org/extlink&oid=6515215 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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