Note 5 - Acquisition (Details) (Alpine Biosciences, Inc. [Member], USD $)
0 Months Ended 3 Months Ended 9 Months Ended
Aug. 08, 2014
Dec. 31, 2014
Dec. 31, 2014
Note 5 - Acquisition (Details) [Line Items]      
Business Acquisition Equity Interest Issued or Issuable Pecentage of Equity 10.00%    
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 27,200,000    
Business Acquisition, Share Price (in Dollars per share) $ 2.93    
Percentage Of Acquisition Consideration For Indemnification Obligations 12.50%    
Indefinite-lived Intangible Assets Acquired 19,700,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent 6,908,000    
Business Combination, Acquisition Related Costs   $ 500,000 $ 12,000,000
Minimum [Member]
     
Note 5 - Acquisition (Details) [Line Items]      
Indefinite-Lived Intangible Asset Valuation Discount Rate 40.00%    
Maximum [Member]
     
Note 5 - Acquisition (Details) [Line Items]      
Indefinite-Lived Intangible Asset Valuation Discount Rate 60.00%