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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 03, 2017
Nov. 30, 2016
Dec. 03, 2017
Nov. 30, 2016
Earnings Per Share [Abstract]        
Net income (loss) $ 2,964 $ (595) $ 4,571 $ 149
Weighted average share outstanding:        
Basic 8,391,244 8,391,244 8,391,244 8,391,244
Common stock equivalents- treasury stock method 171,655   139,947 121,659
Diluted 8,562,899 8,391,244 8,531,191 8,512,903
Basic $ 0.35 $ (0.07) $ 0.54 $ 0.02
Diluted $ 0.35 $ (0.07) $ 0.54 $ 0.02