SIGNIFICANT ACCOUNTING POLICIES AND DISCLOSURES (Details Narrative) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 02, 2017 USD ($)	Jun. 02, 2018 USD ($) Number $ / shares shares	May 27, 2017 USD ($) $ / shares shares	May 28, 2016 USD ($) $ / shares shares	Sep. 12, 2017 USD ($)
Allowance for doubtful accounts		$ 309	$ 398
Foreign exchange (gain) loss		224	612	$ 212
Finished goods		42,600	36,000
Raw material		5,700	5,300
Work in progress		2,400	1,400
Inventory valuation reserves		4,000	3,500
Inventory provisions		773	456	690
Investments			8,200
Investments - current			6,429
Other long-term investments			1,800
Available-for-sale Securities, Equity Securities, Noncurrent			600
Proceeds from the sale of securities		200	300
Gross realized gains and losses on sales		100	100
Net unrealized holding losses		100	100
Depreciation		1,700	2,400	2,000
Construction in progress		1,582	2,063
Other non-current liabilities		921	735
Share-based Compensation		$ 533	437	$ 548
Vesting term		5 years
Exercise period		P10Y
Exercisable term (in years)		5 years
Expiration term (in years)		10 years
Proceeds from share exercised			100
Intrinsic value		$ 200	$ 100
Weighted average fair value of stock option grants (in dollars per share) | $ / shares		$ 0.85	$ 1.14	$ 1.21
Total unrecognized compensation costs		$ 600
Total grant date fair value stock options vested		$ 400
Limit of cash dividends Class B common stock (percent)		90.00%
Common stock options anti-dilutive | shares			848,000	890,000
Income tax provision (benefit)	$ 15,000
Professional fee	$ 5,000
Income tax refund					$ 2,000
State and Local Jurisdiction [Member]
Income tax refund		$ 2
Common Stock [Member]
Common stock shares, authorized | shares		17,000,000
Common Class B [Member]
Common stock shares, authorized | shares		3,000,000
Number of votes per share | Number		10
Employees' 2011 Long-Term Incentive Compensation Plan [Member]
Number of shares authorized | shares		1,500,000
Number of shares for future issuance | shares		524,000
Minimum [Member]
Period of recognition		3 years
Maximum [Member]
Period of recognition		4 years
Healthcare [Member]
Construction in progress		$ 700