Annual report pursuant to Section 13 and 15(d)

Note 13 - Share-based Compensation and Employee Benefit Plans (Details Textual)

v3.19.1
Note 13 - Share-based Compensation and Employee Benefit Plans (Details Textual) - USD ($)
12 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Sep. 20, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,686,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.25 $ 0.93  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 362,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 3 years 109 days    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 100.00%    
Defined Contribution Plan, Vesting Period 4 years    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 18,000 $ 27,000  
Share-based Payment Arrangement, Option [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Share-based Payment Arrangement, Option [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 310,000 586,950  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 111,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 363 days    
Share-based Payment Arrangement, Expense $ 125,000 $ 107,000  
Equity Incentive Plan 2005 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,850,000    
Percent Of Fair Market Value Of Common Stock At Date Of Grant 100.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 0    
The 2018 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     2,500,000
Stock Option Plan 2000 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 0    
The 2005 and 2018 Equity Incentive Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 211,400 143,900  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 90,000 $ 163,000  
Proceeds from Stock Options Exercised 0 0  
Share-based Payment Arrangement, Expense $ 121,000 $ 144,000