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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 |  |  |

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