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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
May 28, 2016
Feb. 27, 2016
Nov. 28, 2015
Aug. 29, 2015
May 30, 2015
Feb. 28, 2015
Nov. 29, 2014
Aug. 30, 2014
May 28, 2016
May 30, 2015
May 31, 2014
Net sales $ 39,568 $ 31,291 $ 34,086 $ 37,071 $ 34,946 $ 33,471 $ 33,841 $ 34,699 $ 142,016 $ 136,957 $ 137,960
Gross profit 13,388 9,750 10,435 11,262 10,218 9,800 10,462 10,658 44,835 41,138 41,014
Loss from continuing operations (155) (2,926) (2,286) (1,399) (2,103) (2,198) (1,144) (83) (6,766) (5,528) (345)
Income (loss) from discontinued operations         (118)   87     (31) (170)
Net loss $ (155) $ (2,926) $ (2,286) $ (1,399) $ (2,221) $ (2,198) $ (1,057) $ (83) $ (6,766) $ (5,559) $ (515)
Common Stock [Member]                      
Loss from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]                      
Loss from continuing operations, basic (in dollars per share) $ (0.01) $ (0.23) $ (0.18) $ (0.10) $ (0.16) $ (0.16) $ (0.08) $ (0.01)      
Loss from continuing operations, diluted (in dollars per share) (0.01) (0.23) (0.18) (0.10) (0.16) (0.16) (0.08) (0.01)      
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]                      
Income (loss) from discontinued operations, basic (in dollars per share)         (0.01)   0.01        
Income (loss) from discontinued operations, diluted (in dollars per share)         (0.01)   0.01        
Net Loss                      
Loss per Common share - Basic: (0.01) (0.23) (0.18) (0.10) (0.17) (0.16) (0.07) (0.01)      
Loss per Common share - Diluted (0.01) (0.23) (0.18) (0.10) (0.17) (0.16) (0.07) (0.01)      
Common Class B [Member]                      
Loss from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]                      
Loss from continuing operations, basic (in dollars per share) (0.01) (0.21) (0.16) (0.10) (0.13) (0.15) (0.07) (0.01)      
Loss from continuing operations, diluted (in dollars per share) (0.01) (0.21) (0.16) (0.10) (0.13) (0.15) (0.07) (0.01)      
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]                      
Income (loss) from discontinued operations, basic (in dollars per share)         (0.01)   0.01        
Income (loss) from discontinued operations, diluted (in dollars per share)         (0.01)   0.01        
Net Loss                      
Loss per Common share - Basic: (0.01) (0.21) (0.16) (0.10) (0.14) (0.15) (0.06) (0.01)      
Loss per Common share - Diluted $ (0.01) $ (0.21) $ (0.16) $ (0.10) $ (0.14) $ (0.15) $ (0.06) $ (0.01)