Basis of Presentation and Business - Additional information (Detail)	3 Months Ended
	Jun. 27, 2020 USD ($) Facility Center	Mar. 28, 2020 USD ($)
Organization And Business Operations [Line Items]
Retained earnings (accumulated deficit)	$ 11,610,000	$ (48,000)
Trade accounts receivable, net	43,412,000	45,733,000
Accounting Standards Update 2016-13 [Member]
Organization And Business Operations [Line Items]
Trade accounts receivable, net	300,000	400,000
Other notes receivable net of reserves	900,000	$ 500,000
Changes in expected credit losses	0
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Organization And Business Operations [Line Items]
Retained earnings (accumulated deficit)	200,000
COVID-19
Organization And Business Operations [Line Items]
CARES act subsidies recognized	600,000
Deferred payroll taxes paid	3,600,000
CEWS payroll subsidies recognized	3,600,000
CEWS subsidies received	$ 1,700,000
U.S [Member]
Organization And Business Operations [Line Items]
Number of manufacturing facilities | Facility	33
Number of sales centers | Center	21
Canada [Member]
Organization And Business Operations [Line Items]
Number of manufacturing facilities | Facility	5