Capital Stock - Summary of Stock Option Activity (Detail) - USD ($)	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Shares	75,000	141,500	274,000
Exercised, Shares	(35,000)	(66,500)	(96,500)
Cancelled, Shares			(36,000)
Ending Balance, Shares	40,000	75,000	141,500
Beginning Balance, Weighted Average Price	$ 7.28	$ 7.13	$ 8.62
Options Exercisable, Shares	40,000
Exercised, Weighted Average Price	$ 7.76	6.97	7.21
Cancelled, Weighted Average Price			16.98
Ending Balance, Weighted Average Price	6.86	7.28	7.13
Options Exercisable, Option Price per Share	$ 6.86
Ending Balance, Weighted Average Remaining Terms (years)	2 years 3 months 18 days
Options Exercisable, Weighted Average Remaining Terms (years)	2 years 3 months 18 days
Ending Balance, Aggregate Intrinsic Value	$ 1,688,920
Options Exercisable, Aggregate Intrinsic Value	$ 1,688,920
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Option Price per Share	$ 5.05	5.05	2.54
Option Price per Share, Exercised	5.05	5.67	2.54
Option Price per Share, Cancelled			7.74
Ending Balance, Option Price per Share	5.67	5.05	5.05
Options Exercisable, Option Price per Share	5.67
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Option Price per Share	19.37	19.37	22.71
Option Price per Share, Exercised	19.37	19.37	22.71
Option Price per Share, Cancelled			22.71
Ending Balance, Option Price per Share	7.74	$ 19.37	$ 19.37
Options Exercisable, Option Price per Share	$ 7.74