Note 8 - Collaborative and License Agreements (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 11, 2014
May 29, 2013
Aug. 07, 2014
Note 8 - Collaborative and License Agreements (Details) [Line Items]              
Research and Development Expense   $ 41,884,000 $ 33,221,000 $ 22,001,000      
Success Based Milestones, Maximum Payment 5,000,000            
Collaborative Arrangement, Co-promotion [Member] | Upfront Payment [Member] | Array BioPharma Inc. [Member]              
Note 8 - Collaborative and License Agreements (Details) [Line Items]              
Research and Development Expense         20,000,000 10,000,000  
Collaborative Arrangement, Co-promotion [Member] | Maximum [Member] | Array BioPharma Inc. [Member]              
Note 8 - Collaborative and License Agreements (Details) [Line Items]              
Contingent Payable         280,000,000    
Collaborative Arrangement, Co-promotion [Member] | Array BioPharma Inc. [Member]              
Note 8 - Collaborative and License Agreements (Details) [Line Items]              
Contract Terms, Years from Effective date for Acquistion Restrictions         3 years    
Expiration Period Following First Commercial on A Country by Country Basis         10 years    
License Agreement Termination Notice Period         180 days    
Collaboration Agreement Termination Fees         $ 0    
STC.UNM [Member]              
Note 8 - Collaborative and License Agreements (Details) [Line Items]              
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners             5.00%