Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Textual) (Details)

v2.4.0.6
Subsequent Events (Textual) (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Feb. 09, 2012
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Dec. 29, 2012
Stock Options [Member]
Dec. 31, 2011
Stock Options [Member]
Jan. 01, 2011
Stock Options [Member]
Feb. 09, 2012
2011 Plan [Member]
Stock Options [Member]
Jan. 24, 2011
2011 Plan [Member]
Stock Options [Member]
Jan. 21, 2011
2011 Plan [Member]
Stock Options [Member]
Feb. 07, 2013
2011 Plan [Member]
Stock Options [Member]
Subsequent Event [Member]
Subsequent Event [Line Items]                      
Options granted (shares) 36,740   100,000         36,740 100,000   40,047
Options granted, weighted average exercise price (dollars per share) $ 11.35   $ 11.55         $ 11.35 $ 11.55   $ 13.70
Annual vesting rate (percent)                   20.00% 20.00%
Period after option grant before options can be exercised (years)                   1 year 1 year
Options granted, weighted average fair value (dollars per share) $ 5.03 $ 6.40 $ 7.93 $ 0.00       $ 5.03 $ 7.93   $ 6.30
Risk free interest rate (percent)               2.04% 3.34%   2.00%
Expected life (years)               7 years 7 years   7 years
Expected volatility rate (percent)               53.00% 0.49%   53.00%
Expected dividend yield (percent)               2.10% 2.10%   1.80%
Share-based compensation expense   $ 337,750 $ 276,553 $ 179,814 $ 228,000 $ 111,000 $ 7,000       $ 252,000
Share-based compensation expense, period of recognition (years)                     60 months