Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net loss for the year	$ (55,229)	$ (23,185)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of property and equipment (note 4)	38	10
Share-based compensation expense (note 7)	1,191	633
Changes in operating assets and liabilities:
Other receivables	119	(271)
Research and development tax credits receivable	(288)	137
Prepaid expenses	(447)	(1,298)
Accounts payable and accrued liabilities	3,520	2,876
Income taxes payable (receivable)	(56)	52
Net cash used in operating activities	(51,152)	(21,046)
Investing activities
Acquisition of property and equipment	(413)	(5)
Acquisition of short-term investments	(35,000)	(3,029)
Redemption of short-term investments	35,029	19,032
Net cash (used in) provided by investing activities	(384)	15,998
Financing activities
Net proceeds from issuance of common shares in Initial Public Offering (note 7)	85,363
Issuance of common shares on exercise of share options (note 7)	44	461
Net cash provided by financing activities	85,407	80,115
Net increase in cash and cash equivalents during the period	33,871	75,067
Cash and cash equivalents – Beginning of year	85,947	10,880
Cash and cash equivalents – End of year	$ 119,818	85,947
Class D1 preferred shares
Financing activities
Issuance of preferred shares		64,719
Class D2 preferred shares
Financing activities
Issuance of preferred shares		$ 14,935