Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 676	$ 392	$ 2,028	$ 809
Operating expenses:
Research and development	20,097	13,686	53,940	26,823
General and administrative	7,571	3,939	20,088	10,809
Total operating expenses	27,668	17,625	74,028	37,632
Loss from operations	(26,992)	(17,233)	(72,000)	(36,823)
Other income (expense):
Dividend income	515		1,287
Interest income (expense), net	1	118	5	328
Other income (expense), net	(75)	(36)	(211)	(25)
Total other income (expense), net	441	82	1,081	303
Loss before income taxes	(26,551)	(17,151)	(70,919)	(36,520)
Income tax benefit (provision)	416	(384)	(905)	(427)
Net loss	$ (26,135)	$ (17,535)	$ (71,824)	$ (36,947)
Net loss per share attributable to ordinary shareholders— basic and diluted	$ (0.94)	$ (0.75)	$ (2.75)	$ (1.64)
Weighted-average ordinary shares used in computing net loss per share attributable to ordinary shareholders—basic and diluted	27,758,792	23,445,673	26,078,696	22,571,575

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.