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Earnings Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 01, 2012
Dec. 03, 2011
Dec. 01, 2012
Dec. 03, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Income from continuing operations, Basic $ 581 $ 1,629 $ 1,315 $ 2,658
Undistributed earnings (losses), Basic (304) 797 (484) 980
Total undistributed earnings (losses), Basic (304) 797 (484) 980
Income (loss) from discontinued operations, Basic (203) (799) (290) 1,803
Undistributed earnings (losses), Basic (1,088) (1,631) (2,089) 125
Total undistributed earnings (losses), Basic (1,088) (1,631) (2,089) 125
Net income, Basic 378 830 1,025 4,461
Undistributed earnings (losses), Basic (507) (2) (774) 2,783
Total undistributed earnings (losses), Basic (507) (2) (774) 2,783
Income from continuing operations, Diluted 581 1,629 1,315 2,658
Undistributed earnings (losses), Diluted (304) 797 (484) 980
Total undistributed earnings (losses), Diluted (304) 797 (484) 980
Income (loss) from discontinued operations, Diluted (203) (799) (290) 1,803
Total undistributed earnings (losses), Diluted (1,088) (1,631) (2,089) 125
Total undistributed earnings (losses), Diluted (1,088) (1,631) (2,089) 125
Net income, Diluted 378 830 1,025 4,461
Undistributed earnings (losses), Diluted (507) (2) (774) 2,783
Total undistributed earnings (losses), Diluted (507) (2) (774) 2,783
Effect of dilutive securities Dilutive stock options 96 152 100 167
Denominator for diluted EPS adjusted for weighted average shares and assumed conversions 15,345 17,161 15,567 17,319
Common Stock
        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Dividends from continuing operations, Basic 737 699 1,495 1,413
Total undistributed earnings (losses), Basic (253) 671 (402) 826
Dividends from discontinued operations, Basic 737 699 1,495 1,413
Total undistributed earnings (losses), Basic (904) (1,373) (1,734) 105
Dividends, Basic 737 699 1,495 1,413
Undistributed earnings (losses), Basic (421) (2) (643) 2,345
Total undistributed earnings (losses), Basic (421) (2) (643) 2,345
Weighted average shares, Basic 12,437 14,069 12,604 14,206
Income from continuing operations per share, Basic $ 0.04 $ 0.10 $ 0.09 $ 0.16
Income (loss) from discontinued operations per share, Basic $ (0.01) $ (0.05) $ (0.02) $ 0.11
Net income per share, Basic $ 0.03 $ 0.05 $ 0.07 $ 0.27
Dividends from continuing operations, Diluted 737 699 1,495 1,413
Total undistributed earnings (losses), Diluted (253) 672 (402) 827
Dividends from discontinued operations, Diluted 737 699 1,495 1,413
Total undistributed earnings (losses), Diluted (905) (1,375) (1,737) 106
Total undistributed earnings (losses), Diluted (905) (1,375) (1,737) 106
Dividends, Diluted 737 699 1,495 1,413
Undistributed earnings (losses), Diluted (422) (2) (643) 2,350
Total undistributed earnings (losses), Diluted (422) (2) (643) 2,350
Common shares - Basic 12,437 14,069 12,604 14,206
Income from continuing operations per share, Diluted $ 0.04 $ 0.09 $ 0.08 $ 0.15
Income (loss) from discontinued operations per share, Diluted $ (0.01) $ (0.05) $ (0.02) $ 0.10
Net income per share, Diluted $ 0.03 $ 0.04 $ 0.06 $ 0.25
Class B Common Stock
        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Dividends from continuing operations, Basic 148 133 304 265
Total undistributed earnings (losses), Basic (51) 126 (82) 154
Dividends from discontinued operations, Basic 148 133 304 265
Total undistributed earnings (losses), Basic (184) (258) (355) 20
Dividends, Basic 148 133 304 265
Undistributed earnings (losses), Basic (86)   (131) 438
Total undistributed earnings (losses), Basic (86)   (131) 438
Weighted average shares, Basic 2,812 2,940 2,863 2,946
Income from continuing operations per share, Basic $ 0.03 $ 0.09 $ 0.08 $ 0.14
Income (loss) from discontinued operations per share, Basic $ (0.01) $ (0.04) $ (0.02) $ 0.10
Net income per share, Basic $ 0.02 $ 0.05 $ 0.06 $ 0.24
Dividends from continuing operations, Diluted 148 133 304 265
Total undistributed earnings (losses), Diluted (51) 125 (82) 153
Dividends from discontinued operations, Diluted 148 133 304 265
Total undistributed earnings (losses), Diluted (183) (256) (352) 19
Total undistributed earnings (losses), Diluted (183) (256) (352) 19
Dividends, Diluted 148 133 304 265
Undistributed earnings (losses), Diluted (85)   (131) 433
Total undistributed earnings (losses), Diluted $ (85)   $ (131) $ 433
Common shares - Basic 2,812 2,940 2,863 2,946
Income from continuing operations per share, Diluted $ 0.03 $ 0.09 $ 0.08 $ 0.14
Income (loss) from discontinued operations per share, Diluted $ (0.01) $ (0.04) $ (0.02) $ 0.10
Net income per share, Diluted $ 0.02 $ 0.05 $ 0.06 $ 0.24