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Long-term debt - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 12, 2021 | Jul. 08, 2020 | Mar. 26, 2022 | Mar. 27, 2021
Line of Credit Facility [Line Items] |  |  |  |
Outstanding letters of credit |  |  | $ 600 | $ 600
Investissement Québec [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, term |  |  | 6 years |
Long-term debt |  | $ 10,000 | $ 10,000 |
Debt Instrument Interest Rate Stated Percentage Rate |  | 3.14% | 3.14% |
Repayment of debt term |  | 60 months | 60 months |
Working capital ratio |  | 1.01 | 1.11 |
Term loan From Business Development Bank of Canada [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, term | 5 years |  |  |
Long-term debt |  |  | $ 374 | $ 0
Debt Instrument Interest Rate Stated Percentage Rate | 8.30% |  |  |
Repayment of debt term | 72 months |  |  |
Debt Instrument, Face Amount | $ 400 |  |  |
Long-term Debt, Gross |  |  | $ 400 |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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=120398452&loc=d3e534808-122878 + Details
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