Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation (Details Textual)

v3.3.1.900
Stock Based Compensation (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 29, 2014
USD ($)
shares
Jan. 02, 2016
USD ($)
Awards
$ / shares
shares
Jan. 02, 2016
GBP (£)
Awards
shares
Dec. 27, 2014
$ / shares
shares
Dec. 28, 2013
shares
Stock Option Plans (Textual) [Abstract]          
Aggregate shares of restricted stock grant   70,000 70,000 103,000 90,000
Total unrecognized compensation | $   $ 4,386      
Recognized weighted average period (in years)   1 year 4 months 28 days 1 year 4 months 28 days    
Ratio for additional common stock shares issued, under ESPP   6 6    
Share based Compensation Expenses | $ $ 173 $ 199      
Director Equity Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Shares available for issuance   25,000      
Remaining number of shares to be issued   270,000      
Stock option granted, shares 17,500 24,375 24,375    
Fee for the chairs of each Board committee   125.00% 125.00%    
Common stock shares for each nonemployee director   500 500    
Share based Compensation Expenses under Director's plan | $ $ 677 $ 829      
2006 Stock Option Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Shares available for issuance   1,125,000      
Exercise price per share not less than fair value percent   110.00% 110.00%    
Exercise price per share more than voting stock   10.00% 10.00%    
Number of awards granted under 2006 plan | Awards   0 0    
2006 Stock Option Plan [Member] | Maximum [Member]          
Stock Option Plans (Textual) [Abstract]          
Stock options maximum term (in years)   10 years 10 years    
2001 Restricted Stock Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Restricted stock expense | $ $ 2,961 $ 3,254      
Equity Incentive Plan (2011 Plan) [Member]          
Stock Option Plans (Textual) [Abstract]          
Aggregate shares of restricted stock grant   1,000,000 1,000,000    
Remaining number of shares to be issued   566,412      
Employee Stock Purchase Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Aggregate shares of restricted stock grant   1,096,875 1,096,875    
Rate of common stock at market value   85.00% 85.00%    
Number of shares purchased by employees 25,238 34,053 34,053    
Weighted average price | $ / shares   $ 29.94   $ 33.52  
Employee Stock Purchase Plan [Member] | Minimum [Member]          
Stock Option Plans (Textual) [Abstract]          
Allowable purchase rate of common stock based on annual salary   10.00% 10.00%    
Employee Stock Purchase Plan [Member] | Minimum [Member] | United States [Member]          
Stock Option Plans (Textual) [Abstract]          
Shares allowed to be purchased by U.S. employees and U.K. employees | $   $ 25      
Employee Stock Purchase Plan [Member] | Minimum [Member] | United Kingdom [Member]          
Stock Option Plans (Textual) [Abstract]          
Shares allowed to be purchased by U.S. employees and U.K. employees | £     £ 1,500    
Employee Stock Purchase Plan and U.K. Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Remaining number of shares to be issued   619,340      
Nonemployee Director Equity and Deferred Compensation Plan [Member]          
Stock Option Plans (Textual) [Abstract]          
Shares available for issuance   199,374