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Long-term debt - Summary of Long Term Debt (Parenthetical) (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 28, 2015 USD ($) Installment | Mar. 28, 2015 CAD Installment | Mar. 29, 2014 USD ($) Installment | Mar. 29, 2014 CAD Installment | Mar. 28, 2015 CAD | Mar. 29, 2014 CAD
Debt Instrument [Line Items] |  |  |  |  |  |
Secured long term debt | 9.50% |  |  |  | 9.50% |
Line of Credit Facility Expiration Date | Jun. 30, 2015 | Jun. 30, 2015 |  |  |  |
Capital Leasing Arrangements [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument Interest Rate Stated Percentage Rate Range Minimum | 6.00% | 6.00% | 6.00% | 6.00% |  |
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum | 10.00% | 10.00% | 10.00% | 10.00% |  |
Term Loan from Investissement Quebec Prime Plus Seven Percent [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 3,643,000 |  | $ 4,519,000 |  |  |
Annual rate of prime plus | 7.00% |  | 7.00% |  | 7.00% | 7.00%
Number of installments | Installment | 60 | 60 | 60 | 60 |  |
Capital repayments | $ 66,242 | CAD 83,333 | $ 66,242 | CAD 83,333 |  |
Balance of term loan | CAD |  |  |  |  | CAD 4,600,000 | CAD 5,000,000
Term Loan from Investissement Quebec Prime Plus Five Point Five Percent [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 3,478,000 |  | $ 4,708,000 |  |  |
Annual rate of prime plus | 5.50% |  | 5.50% |  | 5.50% | 5.50%
Number of installments | Installment | 48 | 48 | 48 | 48 |  |
Capital repayments | $ 165,607 | CAD 208,333 | $ 165,607 | CAD 208,333 |  |
Balance of term loan | CAD |  |  |  |  | CAD 4,375,000 | CAD 5,208,000
Land and Building [Member] | Capital Leasing Arrangements [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Sale Leaseback transaction implicit annual interest | 10.74% | 10.74% | 10.74% | 10.74% |  |
Capital lease period | 20 years | 20 years | 20 years | 20 years |  |
Repayments Of Debt And Capital Lease Obligations | $ 133,356 | CAD 167,762 | $ 133,356 | CAD 167,762 |  |
Outstanding amount of repayment | CAD |  |  |  |  | CAD 12,846,000 | CAD 13,444,000
Term Loan Facility [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 33,000,000 |  | $ 28,000,000 |  |  |
Term Loan Facility [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Secured long term debt | 8.77% |  | 8.77% |  | 8.77% | 8.77%
Line of Credit Facility Expiration Date | Aug. 31, 2018 | Aug. 31, 2018 | Aug. 31, 2018 | Aug. 31, 2018 |  |
Term Loan Facility [Member] | Senior Subordinated Loans [Member] | LIBOR Plus 9.75% [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 28,000,000 |  |  |  |  |
Interest rate description | LIBOR plus 9.75% | LIBOR plus 9.75% |  |  |  |
Long-term debt interest rate | 9.75% | 9.75% |  |  |  |
Term Loan Facility [Member] | Senior Subordinated Loans [Member] | LIBOR Plus 7.25% [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  |  | $ 5,000,000 |  |  |
Interest rate description |  |  | LIBOR plus 7.25% | LIBOR plus 7.25% |  |
Long-term debt interest rate |  |  | 7.25% | 7.25% |  |
Cash Contribution [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 1,500,000 |  | $ 1,500,000 |  |  |
Interest on Cash advances | 11.00% | 11.00% | 11.00% | 11.00% |  |
Term Loan from Investissement Quebec Prime Plus Ten Percent [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 1,590,000 |  |  |  |  |
Annual rate of prime plus | 10.00% |  | 10.00% |  | 10.00% | 10.00%
Capital repayment period | 48 months | 48 months | 48 months | 48 months |  |
Periodic principal payment due | $ 33,334 | CAD 41,667 | $ 33,334 | CAD 41,667 |  |
Outstanding amount of repayment | CAD |  |  |  |  | CAD 2,000,000 |

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