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SIGNIFICANT ACCOUNTING POLICIES AND DISCLOSURES (Details 7) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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May 27, 2017 | Feb. 25, 2017 | Nov. 26, 2016 | Aug. 27, 2016 | May 28, 2016 | Feb. 27, 2016 | Nov. 28, 2015 | Aug. 29, 2015 | May 27, 2017 | May 28, 2016 | May 30, 2015
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Loss from Continuing Operations | $ (125) | $ (1,431) | $ (2,522) | $ (2,850) | $ (155) | $ (2,926) | $ (2,286) | $ (1,399) | $ (6,928) | $ (6,766) | $ (5,528)
Loss from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  | (31)
Undistributed losses, Basic |  |  |  |  |  |  |  |  | (9,959) | (9,845) | (8,819)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | (9,959) | (9,845) | (8,819)
Net loss | $ (125) | $ (1,431) | $ (2,522) | $ (2,850) | $ (155) | $ (2,926) | $ (2,286) | $ (1,399) | $ (6,928) | $ (6,766) | $ (5,559)
Denominator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  |  | 12,845 | 13,049 | 13,833
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  |  | 848 | 890 | 881
Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | $ (1,519) | $ (1,478) | $ (1,254)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | $ (1,519) | $ (1,478) | $ (1,254)
Denominator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic |  |  |  |  |  |  |  |  | 2,140 | 2,141 | 2,151
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  |  | 2,140 | 2,141 | 2,151
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic | $ (0.01) | $ (0.10) | $ (0.18) | $ (0.20) | $ (0.01) | $ (0.21) | $ (0.16) | $ (0.10) | $ (0.49) | $ (0.47) | $ (0.36)
Earnings Per Share, Diluted | (0.01) | (0.10) | (0.18) | (0.20) | (0.01) | (0.21) | (0.16) | (0.10) | $ (0.49) | $ (0.47) | $ (0.36)
Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | $ (9,959) | $ (9,845) | $ (8,788)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | (9,959) | (9,845) | (8,788)
Continuing Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | (1,519) | (1,478) | (1,249)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | $ (1,519) | $ (1,478) | $ (1,249)
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic |  |  |  |  |  |  |  |  | $ (0.49) | $ (0.47) | $ (0.36)
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  | $ (0.49) | $ (0.47) | $ (0.36)
Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | $ (3,031) | $ (3,079) | $ (3,291)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | (3,031) | (3,079) | (3,291)
Discontinued Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | (464) | (464) | (468)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | (464) | (464) | (468)
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | (8,440) | (8,367) | (7,565)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | $ (8,440) | $ (8,367) | $ (7,565)
Denominator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic |  |  |  |  |  |  |  |  | 10,705 | 10,908 | 11,682
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  |  | 10,705 | 10,908 | 11,682
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic | (0.01) | (0.11) | (0.20) | (0.23) | (0.01) | (0.23) | (0.18) | (0.10) | $ (0.55) | $ (0.53) | $ (0.41)
Earnings Per Share, Diluted | $ (0.01) | $ (0.11) | $ (0.20) | $ (0.23) | $ (0.01) | $ (0.23) | $ (0.18) | $ (0.10) | $ (0.55) | $ (0.53) | $ (0.41)
Common Stock [Member] | Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | $ (8,440) | $ (8,367) | $ (7,539)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | $ (8,440) | $ (8,367) | $ (7,539)
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic |  |  |  |  |  |  |  |  | $ (0.55) | $ (0.53) | $ (0.41)
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  | $ (0.55) | $ (0.53) | $ (0.41)
Common Stock [Member] | Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Undistributed losses, Basic |  |  |  |  |  |  |  |  | $ (2,567) | $ (2,615) | $ (2,823)
Undistributed losses, Diluted |  |  |  |  |  |  |  |  | (2,567) | (2,615) | (2,823)
Basic [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Loss from Continuing Operations |  |  |  |  |  |  |  |  | (6,928) | (6,766) | (5,528)
Loss from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  | (31)
Net loss |  |  |  |  |  |  |  |  | (6,928) | (6,766) | (5,559)
Basic [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Basic [Member] | Continuing Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Basic [Member] | Discontinued Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Basic [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 2,567 | 2,615 |
Basic [Member] | Common Stock [Member] | Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 2,567 | 2,615 | 2,794
Basic [Member] | Common Stock [Member] | Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 2,567 | 2,615 | 2,794
Diluted [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Loss from Continuing Operations |  |  |  |  |  |  |  |  | (6,928) | (6,766) | (5,528)
Loss from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  | (31)
Net loss |  |  |  |  |  |  |  |  | (6,928) | (6,766) | (5,559)
Diluted [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Diluted [Member] | Continuing Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Diluted [Member] | Discontinued Operations [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 464 | 464 | 466
Diluted [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 2,567 | 2,615 | 2,794
Diluted [Member] | Common Stock [Member] | Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | 2,567 | 2,615 | 2,794
Diluted [Member] | Common Stock [Member] | Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Less dividends |  |  |  |  |  |  |  |  | $ 2,567 | $ 2,615 | $ 2,794

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