Reconciliation of Number of Common Shares Used in Calculation of Basic and Diluted Earnings Per Share (EPS) (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 27, 2015	Jun. 30, 2016	Jun. 27, 2015
Earnings Per Share [Line Items]
Weighted average shares - Basic	16,659,115	17,384,382	16,634,323	17,360,749
Effect of dilutive securities, shares	13,485	117,837	20,092	139,870
Diluted EPS, shares	16,672,600	17,502,219	16,654,415	17,500,619
Basic EPS	$ 0.20	$ 0.24	$ 0.39	$ 0.28
Effect of dilutive securities				(0.01)
Diluted EPS	$ 0.20	$ 0.24	$ 0.39	$ 0.27