Earnings (Loss) per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings (Loss) per Share

Schedule of basic and diluted loss per share

	Three Months Ended September 30,						Nine Months Ended September 30,
(in thousands, except per share data)	2016			2017			2016			2017
Net loss for the period	$	(14,000	)	$	(22,269	)	$	(39,703	)	$	(52,094	)
Weighted average number of shares outstanding	21,276,610			28,147,226			21,236,260			27,517,267
Basic and diluted loss per share	$	(0.66	)	$	(0.79	)	$	(1.87	)	$	(1.89	)

Schedule of common stock equivalents excluded from calculations of diluted earnings per share

	Three Months Ended September 30,		Nine Months Ended September 30,
	2016	2017	2016	2017
Stock option awards	1,969,810	3,294,240	1,969,810	3,294,240