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Segmented Information - Schedule of Information Relating to Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	[1]	Mar. 25, 2017	[1]
Segment Reporting Information [Line Items]
Revenues	$ 151,049	$ 146,608		$ 152,992
Unadjusted gross profit	60,055	57,755		62,852
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	9,912	13,054		15,637
Retail Segment [Member]
Segment Reporting Information [Line Items]
Unadjusted gross profit	58,936	55,578		61,441
Retail Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	143,499	141,607		149,418
Other Segments [Member]
Segment Reporting Information [Line Items]
Unadjusted gross profit	1,119	2,177		1,411
Other Segments [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	9,912	13,054		15,637
Other Segments [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,550	$ 5,001		$ 3,574
[1] Recast (refer to note 1)

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 280
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