Annual report pursuant to Section 13 and 15(d)

Note 13 - Income Taxes (Details Textual)

v3.20.1
Note 13 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Mar. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 154,000    
Unrecognized Tax Benefits, Ending Balance 132,000 $ 123,000 $ 122,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total 0    
Domestic Tax Authority [Member]      
Operating Loss Carryforwards, Total 47,040,000    
Operating Loss Carryforwards, Not Subject to Expiration $ 740,000    
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]      
Open Tax Year 2015 2016 2017 2018 2019    
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards, Total $ 24,198,000    
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]      
Open Tax Year 2014 2015 2016 2017 2018 2019