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Note 4 - Property and Equipment (Detail) - Property and Equipment (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Property and equipment at cost $ 9,760 $ 9,840
Less: accumulated depreciation (7,997) (8,040)
Property and equipment, net 1,763 1,800
Equipment [Member]
   
Property and equipment at cost 5,885 5,963
Tooling [Member]
   
Property and equipment at cost 2,598 2,600
Furniture and Fixtures [Member]
   
Property and equipment at cost 132 132
Software [Member]
   
Property and equipment at cost 450 462
Leasehold Improvements [Member]
   
Property and equipment at cost 629 633
Construction in Progress [Member]
   
Property and equipment at cost $ 66 $ 50