Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenue:
Collaboration revenue (note 9)	$ 4,010	$ 5,001
Operating expenses:
Research and development	3,427	2,533
General and administrative	1,571	1,300
Total operating expenses	10,147	3,969
Income (loss) from operations	(6,137)	1,032
Other income (expense):
Interest income	152	141
Foreign exchange gain (loss)	(3,171)	200
Net income (loss)	(9,156)	1,373
Net income attributable to participating securities		$ 1,373
Net loss attributable to common shareholders	$ (9,156)
Net loss per common share (note 5):
Basic and diluted	$ (0.64)
Weighted-average shares outstanding (note 5):
Basic and diluted	14,212,579	1,345,312
Other comprehensive income (loss):
Foreign currency translation adjustment		$ (909)
Comprehensive income (loss)	$ (9,156)	464
General and Administrative [Member]
Operating expenses:
General and administrative - stock based compensation	$ 5,149	$ 136