Delinquency status of consumer loans (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Mar. 28, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	$ 88,040	$ 85,990
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	84,852	83,861
31 - 60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	1,200	547
61 - 90 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	26	307
91+ days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	$ 1,962	$ 1,275