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Note 12 - Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Estimated Total Future Milestone Payment (Member)
  
Note 12 - Commitments and Contingencies (Details) [Line Items]  
Effect on Future Cash Flows, Amount $ 1.7
Estimated Amount Payable during 2013 (Member)
  
Note 12 - Commitments and Contingencies (Details) [Line Items]  
Effect on Future Cash Flows, Amount 0.5
Estimated Payable from 2014 - 2016 (Member)
  
Note 12 - Commitments and Contingencies (Details) [Line Items]  
Effect on Future Cash Flows, Amount $ 1.2