Annual report pursuant to Section 13 and 15(d)

Note 1 - Summary of Significant Accounting Policies (Details Textual)

v3.7.0.1
Note 1 - Summary of Significant Accounting Policies (Details Textual)
12 Months Ended
Mar. 25, 2017
USD ($)
shares
Mar. 26, 2016
USD ($)
Mar. 28, 2015
USD ($)
Research and Development Expense $ 2,254,000 $ 2,806,000  
Asset Impairment Charges 0 0  
Cost of Revenue 11,716,000 9,975,000  
Capitalized Computer Software, Net 733,000 876,000  
Capitalized Computer Software, Amortization $ 476,000 0  
Number of Major Customers 2    
Unbilled Receivables, Not Billable, Amount Expected to be Collected in Remainder of Fiscal Year     $ 6,500,000
Revenue Recognition, Milestone Method, Revenue Recognized $ 478,000 $ 1,000,000  
Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Number of Major Customers 3 3  
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Three Customers [Member]      
Concentration Risk, Percentage 67.00% 52.00% 65.00%
Equity Incentive Plan 2005 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares 2,850,000    
Software Development Costs, Amortization Method [Member]      
Cost of Revenue $ 342,000    
Minimum [Member]      
Warranty Term 1 year    
Minimum [Member] | Machinery and Equipment [Member]      
Property, Plant and Equipment, Useful Life 3 years    
Maximum [Member]      
Warranty Term 3 years    
Maximum [Member] | Machinery and Equipment [Member]      
Property, Plant and Equipment, Useful Life 10 years