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Stock-Based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 25, 2015
Nov. 30, 2016
Nov. 30, 2016
Nov. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense   $ 31,000 $ 62,000 $ 35,000
Intrinsic value of stock options outstanding   2,229,000 $ 2,229,000  
Stock options outstanding, Weighted average contractual life     9 years  
Intrinsic value, Options vested and exercisable   387,000 $ 387,000  
Weighted average remaining contractual term, Options vested and exercisable     9 years  
Unrecognized compensation expense related to stock-based awards outstanding   $ 499,000 $ 499,000  
Unrecognized compensation expense, period for recognition     4 years  
Expected dividend yield     0.00%  
2015 Stock Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares of common stock available under the 2015 plan 700,000      
Stock option awards vesting period 10 years