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Note 4 - Detail of Certain Asset Accounts (Details) - Inventories (USD $)
Jun. 27, 2014
Mar. 31, 2014
Inventories [Abstract]    
Raw material $ 2,694,000 $ 3,093,000
Work-in-process 1,039,000 954,000
Finished products 952,000 702,000
Inventories, net $ 4,685,000 $ 4,749,000