| 
           Note 2 - Goodwill, Customer Relationships and Other Intangible Assets (Details) - Amortization Expense (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Jun. 30, 2013 
         | 
        
           Jul. 01, 2012 
         | 
      |
| Note 2 - Goodwill, Customer Relationships and Other Intangible Assets (Details) - Amortization Expense [Line Items] | ||
| Amortization expense | $ 183 | $ 187 | 
| 
           Cost of Sales [Member] 
         | 
        ||
| Note 2 - Goodwill, Customer Relationships and Other Intangible Assets (Details) - Amortization Expense [Line Items] | ||
| Amortization expense | 16 | 16 | 
| 
           Operating Expense [Member] 
         | 
        ||
| Note 2 - Goodwill, Customer Relationships and Other Intangible Assets (Details) - Amortization Expense [Line Items] | ||
| Amortization expense | $ 167 | $ 171 |