CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Sep. 23, 2017	Sep. 24, 2016
Income Statement [Abstract]
Service Revenue	$ 18,239	$ 16,947	$ 36,721	$ 34,122
Distribution Sales	17,688	17,538	35,485	33,510
Total Revenue	35,927	34,485	72,206	67,632
Cost of Service Revenue	13,919	12,807	27,765	25,253
Cost of Distribution Sales	13,854	13,651	27,596	26,106
Total Cost of Revenue	27,773	26,458	55,361	51,359
Gross Profit	8,154	8,027	16,845	16,273
Selling, Marketing and Warehouse Expenses	4,005	4,205	8,097	8,453
General and Administrative Expenses	2,691	2,244	5,879	4,804
Total Operating Expenses	6,696	6,449	13,976	13,257
Operating Income	1,458	1,578	2,869	3,016
Interest and Other Expense, net	271	191	543	359
Income Before Income Taxes	1,187	1,387	2,326	2,657
Provision for Income Taxes	406	470	689	834
Net Income	$ 781	$ 917	$ 1,637	$ 1,823
Basic Earnings Per Share	$ 0.11	$ 0.13	$ 0.23	$ 0.26
Average Shares Outstanding	7,131	6,994	7,102	6,972
Diluted Earnings Per Share	$ 0.11	$ 0.13	$ 0.23	$ 0.25
Average Shares Outstanding	7,286	7,201	7,242	7,173