Stock-Based Compensation - Summary of Stock Option Activity (Detail)	9 Months Ended
	Sep. 26, 2015 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Beginning Balance, Shares	75,000
Exercised, Shares	(31,000)
Ending Balance, Shares	44,000
Options Exercisable, Shares	42,000
Beginning Balance, Weighted Average Price | $ / shares	$ 7.28
Exercised, Weighted Average Price | $ / shares	6.26
Ending Balance, Weighted Average Price | $ / shares	7.99
Options Exercisable, Weighted Average Price | $ / shares	$ 7.45
Ending Balance, Weighted Average Remaining Term (In years)	2 years 9 months 18 days
Options Exercisable, Weighted Average Remaining Term (In years)	2 years 7 months 6 days
Ending Balance, Aggregate Intrinsic Value | $	$ 1,855,300
Options Exercisable, Aggregate Intrinsic Value | $	$ 1,793,710