Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Goodwill, Customer Relationships and Other Intangible Assets - Other Intangible Assets (Details)

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Note 3 - Goodwill, Customer Relationships and Other Intangible Assets - Other Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Apr. 01, 2018
Finite-lived intangible assets, gross amount $ 14,200   $ 14,200
Finite-lived intangible assets, accumulated amortization 7,128   6,928
Amortization expense 200 $ 189  
Cost of Sales [Member]      
Amortization expense 2 2  
Selling, General and Administrative Expenses [Member]      
Amortization expense 198 187  
Trademarks and Trade Names [Member]      
Finite-lived intangible assets, gross amount 3,667   3,667
Finite-lived intangible assets, accumulated amortization 1,318   1,270
Amortization expense 48 34  
Developed Technology [Member]      
Finite-lived intangible assets, gross amount 1,100   1,100
Finite-lived intangible assets, accumulated amortization 100   73
Amortization expense 27  
Noncompete Agreements [Member]      
Finite-lived intangible assets, gross amount 458   458
Finite-lived intangible assets, accumulated amortization 142   122
Amortization expense 20 2  
Patents [Member]      
Finite-lived intangible assets, gross amount 1,601   1,601
Finite-lived intangible assets, accumulated amortization 700   673
Amortization expense 27 27  
Customer Relationships [Member]      
Finite-lived intangible assets, gross amount 7,374   7,374
Finite-lived intangible assets, accumulated amortization 4,868   $ 4,790
Amortization expense $ 78 $ 126