Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of changes in shareholders' equity

Changes in shareholders’ equity for the three months ended March 31, 2020 were as follows:

	Common Shares
	Shares	Amount		Additional Paid-in Capital		Accumulated Deficit		Total Shareholders' Equity (Deficit)
Balance as of December 31, 2019	52,385,283	$	881,426	$	83,523	$	(972,373)	$	(7,424)
Issuance of common shares, net of offering costs	5,555,554	282,833		—		—		282,833
Issuance of common shares under equity incentive plan	447,111	10,880		(8,273)		—		2,607
Non-cash share-based compensation expense	—	—		16,879		—		16,879
Net loss	—	—		—		(172,937)		(172,937)
Balance as of March 31, 2020	58,387,948	$	1,175,139	$	92,129	$	(1,145,310)	$	121,958

Changes in shareholders’ equity for the three months ended March 31, 2019 were as follows:

	Common Shares
	Shares	Amount		Additional Paid-in Capital		Accumulated Deficit		Total Shareholders' Equity (Deficit)
Balance as of December 31, 2018	44,197,549	$	554,384	$	40,104	$	(443,568)	$	150,920
Issuance of common shares under equity incentive plan	85,445	1,961		(896)		—		1,065
Non-cash share-based compensation expense	—	—		7,330		—		7,330
Net loss	—	—		—		(62,304)		(62,304)
Balance as of March 31, 2019	44,282,994	$	556,345	$	46,538	$	(505,872)	$	97,011