Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity (Details)

v2.4.0.6
Shareholders' Equity (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended
Sep. 29, 2012
Dec. 29, 2012
Dec. 31, 2011
Dec. 29, 2012
Common Stock [Member]
Dec. 31, 2011
Common Stock [Member]
Dec. 29, 2012
2011 Plan
Dec. 29, 2012
Stock options
Dec. 31, 2011
Stock options
Dec. 29, 2012
Stock options
Common Stock [Member]
Dec. 31, 2011
Stock options
Common Stock [Member]
Dec. 29, 2012
Stock options
2011 Plan
May 10, 2012
Stock options
2011 Plan
Employees
Aug. 02, 2012
Stock options
2011 Plan
Non-employee directors
May 10, 2012
Stock options
2011 Plan
Non-employee directors
Dec. 29, 2012
Stock options
2006 Plan
Dec. 29, 2012
Stock options
1997 Plan
Shareholders' Equity                                
Issuance of Common Stock (in Shares)       29 34                      
Issuance of Common Stock   $ 86 $ 117 $ 86 $ 117                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value   $ 0             $ 71 $ 96            
Maximum number of shares of common stock which can be issued           700                    
Vesting period                       2 years   6 months    
Options Outstanding             533 588     52       473 8
Granted (in shares)             38 73         8 30    
Granted, exercise price             $ 4.04 $ 4.45         $ 4.01 $ 4.05    
Weighted average grant date fair value (in dollars per share)             $ 3.56 $ 3.86         $ 3.52 $ 3.57    
Assumptions used to estimate the fair value of stock options granted                                
Expected dividend yield (as a percent) 0.00%           0.00% 0.00%                
Expected stock price volatility (as a percent)             95.46% 97.46%                
Risk-free interest rate (as a percent)             1.80% 2.93%                
Expected life of options (in years)             10 years 8 years 10 months 6 days                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]                                
Options Outstanding Balance             588 552     52       473 8
Granted (in shares)             38 73         8 30    
Exercised             (29) (34)                
Cancelled/expired             (59) (3)                
Forfeiture             (5)                  
Options Outstanding Balance             533 588     52       473 8
Weighted average exercise Price, balance             $ 3.99 $ 3.87                
Granted, exercise price             $ 4.04 $ 4.45         $ 4.01 $ 4.05    
Exercisesd, exercise Price             $ 3.03 $ 3.38                
Expired, exercise price             $ 5.25 $ 4.76                
Forfeiture, exercise price             $ 4.25                  
Weighted Average Exercise Price, balance             $ 3.88 $ 3.99