Operating Results by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 30, 2014	Aug. 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 34,699	$ 34,257
Gross Profit	10,658	10,192
EDG
Segment Reporting Information [Line Items]
Net Sales	27,438	25,479
Gross Profit	8,686	7,859
Canvys
Segment Reporting Information [Line Items]
Net Sales	5,968	7,446
Gross Profit	1,656	1,903
Healthcare [Member]
Segment Reporting Information [Line Items]
Net Sales	1,293	1,332
Gross Profit	$ 316	$ 430