Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 15,100	$ 24,755
Marketable securities	175,827	116,603
Accounts receivable	1,609	813
Prepaid expenses and other current assets	2,274	2,695
Total current assets	194,810	144,866
Operating lease right-of-use asset, net (note 7)	886	933
Property, plant and equipment, net	2,954	1,660
Deferred tax assets (note 12)	478	238
Total assets	199,128	147,697
Current liabilities:
Accounts payable and accrued expenses (note 8)	8,875	8,818
Deferred revenue (note 11)	7,446	29,743
Operating lease liability (note 7)	596	168
Term loan (note 9)		4,650
Total current liabilities	16,917	43,379
Deferred revenue, long-term (note 11)		709
Operating lease liability, long-term (note 7)	188	743
Term loan, long-term (note 9)		10,889
Total liabilities	17,105	55,720
Shareholders’ equity:
Preferred shares, without par value; unlimited shares authorized; issued and outstanding: 1,016,000 (December 31, 2019 - 1,016,000) (note 10)	7,732	7,732
Common shares, without par value; unlimited shares authorized; issued and outstanding: 34,994,946 (December 31, 2019 - 28,139,228) (note 10)	397,654	294,244
Additional paid-in capital	43,796	40,646
Accumulated deficit	(266,169)	(249,655)
Accumulated other comprehensive loss	(990)	(990)
Shareholders' equity	182,023	91,977
Total liabilities and shareholders’ equity	199,128	147,697
Commitments and contingencies (note 13)