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Note 10 - Warranty Obligations (Details) - Reconciliation of Company's Estimated Warranty Obligations (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Reconciliation of Company's Estimated Warranty Obligations [Abstract]        
Balance at beginning of period $ 63 $ 93 $ 61 $ 114
Provision, net 17 2 27 (9)
Warranty costs incurred (7) (15) (15) (25)
Balance at end of period $ 73 $ 80 $ 73 $ 80