SIGNIFICANT ACCOUNTING POLICIES AND DISCLOSURES (Details Narrative) $ / shares in Units, $ in Thousands	12 Months Ended
	May 27, 2017 USD ($) Votes $ / shares shares	May 28, 2016 USD ($) $ / shares shares	May 30, 2015 USD ($) $ / shares shares	May 28, 2011 USD ($)
Allowance for doubtful accounts	$ 398	$ 364
Foreign exchange (gain) loss	612	212	$ (185)
Finished goods	36,000	40,000
Raw material	5,300	4,400
Work in progress	1,400	1,000
Inventory valuation reserves	3,500	3,400
Inventory provisions	456	690	228
Investments	8,200	9,500
Investments - current	6,429	2,268
Other long-term investments	1,800	7,200
Available-for-sale Securities, Equity Securities, Noncurrent	600	600
Proceeds from the sale of securities	300	300	200
Gross realized gains and losses on sales	100	100	100
Net unrealized holding losses	100	100	100
Business acquisition, transaction costs				$ 238,800
Depreciation	2,400	2,200	1,700
Construction in progress	2,063	2,721
Severance expense	1,300
Payment of severance benefits	1,200
Other non-current liabilities	735	967
Share-based Compensation	$ 437	548	726
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	$ 100	$ 100	$ 200
Weighted average fair value of stock option grants (in dollars per share) | $ / shares	$ 1.14	$ 1.21	$ 3.71
Total unrecognized compensation costs	$ 900
Total grant date fair value stock options vested	$ 500
Limit of cash dividends Class B common stock (percent)	90.00%
Common stock options anti-dilutive | shares	848,000	890,000	881,000
Common Class B [Member]
Common stock shares, authorized | shares	3,000,000
Number of votes per share | Votes	10
Common Stock [Member]
Number of share exercised | shares	5,000	28,000	47,000
Common stock shares, authorized | shares	17,000,000
Employees' 2011 Long-Term Incentive Compensation Plan [Member]
Number of shares authorized | shares	1,500,000
Number of shares for future issuance | shares	850,000
Minimum [Member]
Period of recognization	3 years
Maximum [Member]
Period of recognization	4 years
Healthcare [Member]
Construction in progress	$ 1,900