Share-Based Compensation Plans - Summary of stock option activity (Details) (USD $)	12 Months Ended
	Dec. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at beginning of year, shares	$ 1,418,155
Outstanding at beginning of year, weighted average exercise price per share	1.25
Granted, shares	231,000
Granted, price per share	1
Shares exercised	(250,000)
Weighted average exercise price, per share	$ 0.37
Shares forfeited	(21,000)
Weighted average exercise price, per share	$ 1.53
Shares expired	(32,000)
Weighted average exercise price, per share	$ 0.31
Outstanding at end of year, shares	1,346,155
Outstanding at end of year, weighted average price per share	$ 1.39
Outstanding at end of year, weighted remaining contractual life (years)	7 years 1 month 28 days
Outstanding at end of year, aggregate intrinsic value	1,401,461
Options exercisable at year-end, shares	799,113
Options exercisable at year-end, weighted average exercise price per share	$ 1.38
Options exercisable at year-end weighted remaining contractual life (years)	6 years 21 days
Options exercisable at year-end, aggregate intrinsic value	$ 803,570