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Basis of Presentation and Business - Additional information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 26, 2020 USD ($) Center | Jun. 27, 2020 USD ($) | Sep. 26, 2020 USD ($) Facility Center | Mar. 29, 2020 USD ($) | Mar. 28, 2020 USD ($)
Organization And Business Operations [Line Items] |  |  |  |  |
Decreased in retained earnings | $ (29,121) |  | $ (29,121) |  | $ 48
Trade accounts receivable, net | 46,826 |  | 46,826 |  | 45,733
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
Organization And Business Operations [Line Items] |  |  |  |  |
Increase in allowance for credit losses |  |  |  | $ 200 |
Decreased in retained earnings |  |  |  | $ 200 |
Trade accounts receivable, net | 300 |  | 300 |  | 400
Other notes receivable net of reserves | 400 |  | 400 |  | $ 500
COVID-19 |  |  |  |  |
Organization And Business Operations [Line Items] |  |  |  |  |
CARES act subsidies recognized |  | $ 600 |  |  |
Deferred payroll taxes paid |  |  | 7,400 |  |
CEWS payroll subsidies recognized | $ 2,600 |  | 6,200 |  |
CEWS subsidies received |  |  | $ 5,600 |  |
U.S [Member] |  |  |  |  |
Organization And Business Operations [Line Items] |  |  |  |  |
Number of manufacturing facilities | Facility |  |  | 33 |  |
Number of sales centers | Center | 18 |  | 18 |  |
Canada [Member] |  |  |  |  |
Organization And Business Operations [Line Items] |  |  |  |  |
Number of manufacturing facilities | Facility |  |  | 5 |  |

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