Share Based Compensation - Stock Option Activity (Detail)	12 Months Ended
	Dec. 28, 2013 CAD	Dec. 29, 2012 CAD	Dec. 31, 2011 CAD	Jan. 01, 2011 USD ($)	Jan. 01, 2011 CAD	Dec. 28, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2011 USD ($)
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Beginning balance, Shares						830,000		468,000	284,000
Stock options granted, shares	392,000	385,000
Stock options granted, Weighted average exercise price	9.36	6.47
Beginning balance, Weighted average remaining contractual term (years)	7 years 7 months 6 days	7 years 3 months 18 days	1 year 8 months 12 days	4 years 2 months 12 days	4 years 2 months 12 days
Options exercised, Shares	0	0	(275,000)
Vested at December 28, 2013, Weighted average remaining contractual term (years)	1 year 1 month 6 days
Exercisable at December 28, 2013, Weighted average remaining contractual term (years)	1 year 1 month 6 days
Options forfeited or expired, Shares	(30,000)	(201,000)	(145,000)
Ending balance, Shares				704,000	704,000	830,000		468,000	284,000
Beginning balance, Weighted average exercise price	7.28	20.47	16.67			$ 8.29		$ 7.28	$ 20.47
Vested at December 28, 2013, Shares						125,000
Options exercised, Weighted average exercise price			1.32
Exercisable at December 28, 2013, Shares						125,000
Options forfeited or expired, Weighted average exercise price	6.47	24.40	38.27
Ending balance, Weighted average exercise price	8.29	7.28	20.47		16.67	$ 8.29		$ 7.28	$ 20.47
Beginning balance, Aggregate intrinsic value						$ 1,068,700	$ 819,900		$ 263,000
Vested at December 28, 2013, Weighted average exercise price	9.49
Exercisable at December 28, 2013, Weighted average exercise price	9.49
Ending balance, Aggregate intrinsic value				625,000		1,068,700	819,900		263,000
Vested at December 28, 2013, Aggregate intrinsic value						386,300
Exercisable at December 28, 2013, Aggregate intrinsic value						$ 386,300