Earnings (Loss) per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings (Loss) per Share

Schedule of basic and diluted loss per share

	Three Months Ended
	March 31,
(in thousands, except per share data)	2019		2020
Net loss for the period	$	(20,217)	$	(23,259)
Weighted average number of shares outstanding		68,701,599		94,595,152
Basic and diluted loss per share	$	(0.29)	$	(0.25)

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

	Three Months Ended
	March 31,
	2019	2020
Stock option awards	8,242,762	11,227,159
Restricted stock units	1,792,850	2,287,021