Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

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Shareholders' Equity (Details) (USD $)
9 Months Ended
Sep. 27, 2014
Shareholders' Equity  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%
2011 Plan
 
Shareholders' Equity  
Maximum number of shares of common stock which can be issued 700,000
Stock options
 
Shareholders' Equity  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 86.40%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 2.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 7 years 8 months 16 days
Stock options | 2011 Plan
 
Shareholders' Equity  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 170,000
Options outstanding (in shares) 537,000
Stock options | 2011 Plan | Director
 
Shareholders' Equity  
Vesting period 6 months
Stock options | 2006 Plan
 
Shareholders' Equity  
Options outstanding (in shares) 381,000
Stock options | 1997 Plan
 
Shareholders' Equity  
Options outstanding (in shares) 8,000
Minimum | Stock options | 2011 Plan
 
Shareholders' Equity  
Vesting period 6 months
Minimum | Stock options | 2011 Plan | Employees
 
Shareholders' Equity  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 2.89
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.21
Vesting period 2 years
Maximum | Stock options | 2011 Plan
 
Shareholders' Equity  
Vesting period 3 years
Maximum | Stock options | 2011 Plan | Employees
 
Shareholders' Equity  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 3.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.94
Vesting period 3 years