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Note 7 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
    December 31,
    2015   2014
Equipment and software   $ 24,512     $ 24,176  
Furniture and fixtures     1,240       1,296  
Leasehold improvements     27,622       27,589  
Construction in progress     11,274       559  
  Subtotal     64,648       53,620  
Less accumulated depreciation     (24,540 )     (21,951 )
  Total   $ 40,108     $ 31,669