Schedule II - Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Allowance, Credit Loss [Member] - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2019		Mar. 25, 2018	Mar. 26, 2017
Balance at beginning of period		$ 468		$ 457	$ 471
Additions charged to costs and expenses		100		34	53
Additions charged to other accounts		77	[1]
Deductions	[2]	(60)		(23)	(67)
Balance at end of period		$ 585		$ 468	$ 457

[1] Reclassification to conform with Topic 606.

[2] Uncollectible amounts written off.