Annual report pursuant to Section 13 and 15(d)

Note 14 - Commitments and Contingencies (Details Textual)

v3.19.1
Note 14 - Commitments and Contingencies (Details Textual)
12 Months Ended
Mar. 30, 2019
USD ($)
Mar. 31, 2018
USD ($)
Feb. 01, 2019
ft²
Apr. 30, 2017
ft²
Jan. 05, 2017
ft²
Operating Leases, Rent Expense, Net, Total $ 374,000 $ 460,000      
Capital Leases, Balance Sheet, Assets by Major Class, Net, Total 249,000 249,000      
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 228,000 $ 174,000      
Long-term Purchase Commitment, Amount $ 1,260,000        
San Ramon, CA [Member]          
Area of Real Estate Property | ft²       47,300  
Dublin, CA [Member] | Commercial Building Lease [Member]          
Area of Real Estate Property | ft²         23,873
Lessee, Operating Lease, Term of Contract         6 years 150 days
Nashua NH [Member] | Engineering Facility [Member]          
Area of Real Estate Property | ft²     1,200