Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock-based Compensation and Employee Benefit Plans (Details Textual)

v3.22.0.1
Note 10 - Stock-based Compensation and Employee Benefit Plans (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 26, 2021
Dec. 25, 2021
Dec. 26, 2020
Dec. 25, 2021
Dec. 26, 2020
Mar. 27, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)       42,000   148,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)   2 years 4 months 2 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares) 12,258   12,675      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value   $ 57,000 $ 53,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)       0 0  
Share-based Payment Arrangement, Expense       $ 356,000 $ 182,000  
Share-based Payment Arrangement, Option [Member]            
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   327,000   $ 327,000    
Stock Appreciation Rights (SARs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       0   0
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       38,020 0  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total   $ 27,000   $ 27,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       9 months 18 days    
Share-based Payment Arrangement, Expense       $ 58,000 $ 23,000  
The 2018 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)   416,667   416,667    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   79,307   79,307    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value       $ 118,904    
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)       4 years    
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)       10 years    
Equity Incentive Plan 2005 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   0   0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)       42,000