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Note 4 - Property, Equipment and Leasehold Improvements (Tables)
9 Months Ended
Sep. 30, 2012
Property, Plant and Equipment [Table Text Block]
  Estimated useful lives (years)  
December 31,
2011
   
September 30,
2012
 
Building
 
15
    $ 600     $ 600  
Computer and office equipment
 
3
      10,742       14,822  
Furniture and fixtures
 3
to
5     1,682       2,351  
Leasehold improvements
 
Lease term
      627       1,567  
            13,651       19,340  
Less accumulated depreciation and amortization
          4,733       8,791  
Total
        $ 8,918     $ 10,549