Significant accounting policies (Details 2) (Poniard Pharmaceuticals Inc.)
12 Months Ended
Dec. 31, 2014
Poniard Pharmaceuticals Inc.
 
Disclosure of warrant  
Warrant term from the date of issuance 3 years
Number of trading days preceding the issuance of the warrant during which the exercise price of the warrant is equal to the average closing price of common stock 5 days