Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Leases (Details Textual)

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Note 11 - Leases (Details Textual)
 3 Months Ended 9 Months Ended
Jan. 01, 2023
USD ($)
Dec. 26, 2021
USD ($)
Jan. 01, 2023
USD ($)
Dec. 26, 2021
USD ($)
Feb. 03, 2023
USD ($)
ft²
Operating Lease, Payments $ 492,000 $ 460,000 $ 1,500,000 $ 1,400,000  
Operating Lease, Weighted Average Remaining Lease Term (Year) 1 year 7 months 6 days   1 year 7 months 6 days    
Operating Lease, Weighted Average Discount Rate, Percent 3.60%   3.60%    
Lessee, Operating Lease, Liability, to be Paid, Year One $ 493,000   $ 493,000    
Lessee, Operating Lease, Liability, to be Paid, Year Two 563,000   563,000    
Lessee, Operating Lease, Liability, to be Paid, Year Three 223,000   223,000    
Lessee, Operating Lease, Liability, to be Paid, Year Four $ 171,000   $ 171,000    
Facility in Compton, California [Member] | Subsequent Event [Member]          
Area of Real Estate Property (Square Foot) | ft²         157,400
Lessee, Operating Lease, Term of Contract (Month)         60 months
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year         $ 2,800,000
Lessee, Operating Lease, Liability, to be Paid, Year One         3,500,000
Lessee, Operating Lease, Liability, to be Paid, Year Two         3,700,000
Lessee, Operating Lease, Liability, to be Paid, Year Three         3,800,000
Lessee, Operating Lease, Liability, to be Paid, Year Four         4,000,000.0
Lessee, Operating Lease, Liability, to be Paid, Year Five         $ 663,000