Annual report pursuant to Section 13 and 15(d)

Note 8 - Stock-based Compensation (Details Textual)

v3.19.1
Note 8 - Stock-based Compensation (Details Textual) - USD ($)
$ in Thousands
12 Months Ended 72 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Jul. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 385,929 1,468,716 387,255    
Allocated Share-based Compensation Expense, Total $ 157 $ 75 $ 78    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 629,893 53,622 112,739    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 413        
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0 0      
Allocated Share-based Compensation Expense, Total $ 250 $ 357 $ 345    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year        
Restricted Stock Units (RSUs) [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years        
Incentive 2010 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         350,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized     1,500,000 1,944,022  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Annual Increase 193,807 194,394      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 661,938        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     0    
Incentive 2010 Plan [Member] | Performance-based Options [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years