Delinquency status of consumer loans (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Mar. 28, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	$ 95,104	$ 85,990
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	92,390	83,861
31 - 60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	751	547
61 - 90 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	258	307
91+ days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans receivable	$ 1,705	$ 1,275