Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands		12 Months Ended
		Mar. 26, 2017	Mar. 27, 2016	Mar. 29, 2015
Deductions	[1]	$ (67)	$ (10)	$ (13)
Balance at end of period		457	471	443
Balance at beginning of period		471	443	433
Additions charged to costs and expenses		53	38	23
Additions charged to other accounts

[1] Uncollectible amounts written off.