Earnings (Loss) per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings (Loss) per Share

Schedule of basic and diluted loss per share

	Year ended December 31,
(in thousands, except per share data)	2018		2019		2020
Net loss for the period	$	(114,780)	$	(82,764)	$	(69,484)
Weighted average number of shares outstanding		5,079,576		7,419,948		12,845,089
Basic and diluted loss per share	$	(22.60)	$	(11.15)	$	(5.41)

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

	Year ended December 31
	2018	2019	2020
Stock option awards	609,134	816,891	1,052,838
Restricted stock units	137,210	105,169	239,384
Warrants	—	1,379,310	5,438,842