Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net loss for the period	$ (36,940)	$ (13,469)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of property and equipment	14	8
Share-based compensation expense (note 5)	837	289
Changes in operating assets and liabilities:
Other receivables	(110)	(14)
Research and development tax credits receivable	(166)	200
Prepaid expenses	(2,119)	(1,369)
Operating lease, net	(11)
Accounts payable and accrued liabilities	4,001	624
Income taxes payable	(55)	(4)
Net cash used in operating activities	(34,549)	(13,735)
Investing activities
Acquisition of property and equipment	(312)	(5)
Acquisition of short-term investments	(35,000)	(9,000)
Redemption of short-term investments	5,029	16,018
Net cash (used in) provided by investing activities	(30,283)	7,013
Financing activities
Net proceeds from issuance of common shares in Initial Public Offering (note 5)	85,361
Issuance of common shares on exercise of share options (note 5)	25	37
Net cash provided by financing activities	85,386	37
Net increase in cash and cash equivalents during the period	20,554	(6,685)
Cash and cash equivalents – Beginning of period	85,947	10,880
Cash and cash equivalents – End of period	$ 106,501	$ 4,195