Earnings (Loss) per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings (Loss) per Share

Schedule of basic and diluted loss per share

	Three Months Ended
	March 31,
(in thousands, except share and per share data)	2018		2019
Net loss for the period	$	(13,342)	$	(20,217)
Weighted average number of shares outstanding		36,911,604		68,701,599
Basic and diluted loss per share	$	(0.36)	$	(0.29)

Schedule of ordinary share equivalents excluded from the calculations of diluted loss per share

	Three Months Ended
	March 31,
(in thousands)	2018		2019
Stock options		4,853,349		8,242,762
Restricted stock units		339,550		1,792,850