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v3.21.1

Long-term debt - Summary of Long Term Debt (Parenthetical) (Detail) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jul. 08, 2020 | Mar. 27, 2021 | Mar. 28, 2020
Debt Instrument [Line Items] |  |  |
Net of deferred financing costs |  | $ 300,000 | $ 400,000
Finance Lease Obligations [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument Interest Rate Stated Percentage Rate |  | 2.20% | 2.20%
Finance Lease Obligations [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument Interest Rate Stated Percentage Rate |  | 3.90% | 3.90%
Investissement Québec [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument Interest Rate Stated Percentage Rate | 3.14% | 3.14% |
Long-term debt | $ 10,000,000 | $ 10,000,000 |
Repayment of debt term | 60 months | 60 months |
Deferred financing costs |  | $ 44,000 |
Cash Contribution one [Member] | Montel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest on Cash advances |  | 11.00% | 11.00%
Cash received from related party |  | $ 1,500,000 | $ 1,500,000
Long-term debt |  | $ 1,887,000 | $ 2,109,000
Cash Contribution Two [Member] | Montel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest on Cash advances |  | 11.00% | 11.00%
Line of Credit Facility Repayment Date |  | Aug. 31, 2021 | Aug. 31, 2021
Cash received from related party |  | $ 2,500,000 | $ 2,500,000
Long-term debt |  | $ 1,573,000 | $ 1,757,000
Term Loan Facility Repayable At October Two Thousand Twenty Two [Member] | Term Loan From SLR Credit Solutions CDOR Plus Eight Point Two Five Percent [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument Interest Rate Stated Percentage Rate |  | 8.25% | 8.25%
Net of deferred financing costs |  | $ 167,000 | $ 272,000
Long-term debt |  | $ 12,333,000 | $ 12,228,000

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