Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation (Details Textual)

v3.8.0.1
Note 6 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Dec. 31, 2017
Jul. 02, 2017
Jan. 01, 2017
Jul. 03, 2016
Dec. 31, 2017
Jan. 01, 2017
Common Stock, Capital Shares Reserved for Future Issuance     672,000       672,000  
Allocated Share-based Compensation Expense     $ 129,000   $ 149,000   $ 406,000 $ 456,000
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount             0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value     53,000       53,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value     35,000       35,000  
Proceeds from Stock Options Exercised         0   $ 0 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value         45,000     214,000
Payments Related to Tax Withholding for Share-based Compensation       $ 56,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition             261 days  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       20,604      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value       $ 167,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     377,000       $ 377,000  
Employee Stock Option [Member]                
Allocated Share-based Compensation Expense     19,000   23,000   $ 62,000 88,000
Payments Related to Tax Withholding for Share-based Compensation         $ 14,000     $ 75,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             2 years  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options     $ 97,000       $ 97,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition             309 days  
Restricted Stock [Member] | Non Employee Directors [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             2 years  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 28,000 28,000            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 157,000 $ 281,000            
Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             2 years  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition             3 years