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Long-term debt - Summary of Long Term Debt (Parenthetical) (Detail) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2015 Installment | Mar. 26, 2016 USD ($) Installment | Mar. 26, 2016 CAD Installment | Mar. 28, 2015 USD ($) Installment | Mar. 28, 2015 CAD Installment | Mar. 26, 2016 CAD | Mar. 28, 2015 CAD
Debt Instrument [Line Items] |  |  |  |  |  |  |
Number of installments | Installment | 2 |  |  |  |  |  |
Capital Leasing Arrangements [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument Interest Rate Stated Percentage Rate Range Minimum |  | 5.80% | 5.80% | 5.80% | 5.80% |  |
Debt Instrument Interest Rate Stated Percentage Rate Range Maximum |  | 14.90% | 14.90% | 14.90% | 14.90% |  |
Term Loan from Investissement Quebec Prime Plus Seven Percent [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  | $ 2,826,000 |  | $ 3,643,000 |  |  |
Annual rate of prime plus |  | 7.00% |  | 7.00% |  | 7.00% | 7.00%
Number of installments | Installment |  | 60 | 60 | 60 | 60 |  |
Capital repayments |  | $ 62,798 | CAD 83,333 | $ 62,798 | CAD 83,333 |  |
Balance of term loan | CAD |  |  |  |  |  | CAD 3,700,000 | CAD 4,600,000
Term Loan from Investissement Quebec Prime Plus Five Point Five Percent [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  | $ 2,355,000 |  | $ 3,478,000 |  |  |
Annual rate of prime plus |  | 5.50% |  | 5.50% |  | 5.50% | 5.50%
Number of installments | Installment |  | 48 | 48 | 48 | 48 |  |
Capital repayments |  | $ 156,995 | CAD 208,333 | $ 156,995 | CAD 208,333 |  |
Balance of term loan | CAD |  |  |  |  |  | CAD 3,100,000 | CAD 4,400,000
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 |  | $ 139,063 | CAD 184,537 | $ 139,063 | CAD 184,537 |  |
Outstanding amount of repayment | CAD |  |  |  |  |  | CAD 12,100,000 | CAD 12,800,000
Term Loan Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  | $ 33,000,000 |  | $ 33,000,000 |  |  |
Term Loan Facility [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility Repayment Date |  | Aug. 31, 2018 | Aug. 31, 2018 | Aug. 31, 2018 | Aug. 31, 2018 |  |
Term Loan Facility [Member] | LIBOR Plus 9.75% [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt interest rate |  | 9.75% | 9.75% | 9.75% | 9.75% |  |
Long-term debt |  | $ 28,000,000 |  | $ 28,000,000 |  |  |
Interest rate description |  | LIBOR plus 9.75% | LIBOR plus 9.75% | LIBOR plus 9.75% | LIBOR plus 9.75% |  |
Term Loan Facility [Member] | LIBOR Plus 7.25% [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt interest rate |  | 7.25% | 7.25% | 7.25% | 7.25% |  |
Long-term debt |  | $ 5,000,000 |  | $ 5,000,000 |  |  |
Interest rate description |  | LIBOR plus 7.25% | LIBOR plus 7.25% | LIBOR plus 7.25% | LIBOR plus 7.25% |  |
Term Loan Facility Repaid in May 2016 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  | $ 1,250,000 |  |  |  |  |
Term Loan Facility Repaid in May 2016 [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of Credit Facility Repayment Date |  | May 31, 2016 | May 31, 2016 | May 31, 2016 | May 31, 2016 |  |
Term Loan Facility Repaid in May 2016 [Member] | LIBOR Plus 9.75% [Member] | Senior Subordinated Loans [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt interest rate |  | 9.75% | 9.75% | 9.75% | 9.75% |  |
Interest rate description |  | LIBOR plus 9.75% | LIBOR plus 9.75% | LIBOR plus 9.75% | LIBOR plus 9.75% |  |
Cash Contribution [Member] | Montrovest BV [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 |  | $ 1,383,000 |  | $ 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 |  | $ 31,399 | CAD 41,667 | $ 31,399 | CAD 41,667 |  |
Outstanding amount of repayment | CAD |  |  |  |  |  | CAD 1,800,000 | CAD 2,000,000

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