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Note 11 - Share Based Compensation (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Dec. 31, 2011
Share Based Compensation Expiration Period of Stock Options 10 years        
Share-based Compensation (in Dollars) $ 6 $ 19 $ 60 $ 69  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     20,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 110,000   110,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 811,344   811,344   916,594
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 419,100   419,100    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars) $ 37   $ 37    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date     85.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 10.00%   10.00%    
ESPP [Member]
         
Stock Issued During Period, Shares, Employee Stock Purchase Plans     15,304    
The 1994 Plan [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     1 year    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 10,000   10,000    
The 1996 Plan [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 1,250,000   1,250,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 491,500   491,500    
The 2000 Plan [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 1,500,000   1,500,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 193,444   193,444    
The 2007 Plan [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 700,000   700,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 116,400   116,400    
Maximum Shares Issued Pursuant to Stock-based Awards [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 350,000   350,000    
Maximum Shares That May Be Granted to Any Individual [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 300,000   300,000    
ESPP [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 247,752   247,752