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 6 Months Ended
Oct. 01, 2017
Oct. 02, 2016
Oct. 01, 2017
Oct. 02, 2016
Apr. 02, 2017
Finite-lived intangible assets, gross amount $ 12,080   $ 12,080   $ 9,220
Finite-lived intangible assets, accumulated amortization 6,521   6,521   6,092
Amortization of Intangible Assets 240 $ 188 429 $ 377  
Amortization of intangibles 240 188 429 377  
Cost of Sales [Member]          
Amortization of Intangible Assets 1 1 3 3  
Amortization of intangibles 1 1 3 3  
Selling, General and Administrative Expenses [Member]          
Amortization of Intangible Assets 239 187 426 374  
Amortization of intangibles 239 187 426 374  
Trademarks and Trade Names [Member]          
Finite-lived intangible assets, gross amount 3,387   3,387   1,987
Finite-lived intangible assets, accumulated amortization 1,154   1,154   1,066
Amortization of Intangible Assets 54 33 88 67  
Amortization of intangibles 54 33 88 67  
Developed Technology [Member]          
Finite-lived intangible assets, gross amount 1,100   1,100  
Finite-lived intangible assets, accumulated amortization 18   18  
Amortization of Intangible Assets 18 18  
Amortization of intangibles 18 18  
Noncompete Agreements [Member]          
Finite-lived intangible assets, gross amount 458   458   98
Finite-lived intangible assets, accumulated amortization 82   82   67
Amortization of Intangible Assets 13 1 15 3  
Amortization of intangibles 13 1 15 3  
Patents [Member]          
Finite-lived intangible assets, gross amount 1,601   1,601   1,601
Finite-lived intangible assets, accumulated amortization 619   619   565
Amortization of Intangible Assets 27 27 54 54  
Amortization of intangibles 27 27 54 54  
Customer Relationships [Member]          
Finite-lived intangible assets, gross amount 5,534   5,534   5,534
Finite-lived intangible assets, accumulated amortization 4,648   4,648   $ 4,394
Amortization of Intangible Assets 128 127 254 253  
Amortization of intangibles $ 128 $ 127 $ 254 $ 253