CALCULATION OF EARNINGS PER SHARE (Details Narrative)	3 Months Ended	9 Months Ended
Feb. 27, 2016 shares	Feb. 28, 2015 shares	Feb. 27, 2016 Votes / shares shares	Feb. 28, 2015 shares
Limit of cash dividends Class B common stock			90.00%
Common stock options anti-dilutive	1,019,939	886,064	800,164	726,564
Common Stock [Member]
Common stock shares, authorized	17,000,000		17,000,000
Common Class B [Member]
Common stock shares, authorized	3,000,000		3,000,000
Number of votes per share \| Votes / shares			10

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration