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Earnings Per Common Share - Weighted Average Shares Outstanding Used in Computing Basic and Diluted Earnings Per Share (Detail) - shares
3 Months Ended
Sep. 27, 2018
Sep. 28, 2017
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]    
Weighted average number of shares outstanding - basic 11,406,009 11,351,307
Effect of dilutive securities:    
Stock options and restricted stock units 85,922 90,861
Weighted average number of shares outstanding - diluted 11,491,931 11,442,168