CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common shares, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Common shares, authorized (in shares)	200,000,000	200,000,000	200,000,000	200,000,000	200,000,000	200,000,000	200,000,000	200,000,000	200,000,000
Common shares, issued (in shares)	89,303,545	88,451,668	88,419,303	86,302,352	86,268,303	86,266,122	86,264,641	85,989,836	87,050,465
Common shares, outstanding (in shares)	89,303,545	88,451,668	88,419,303	86,302,352	86,268,303	86,266,122	86,264,641	85,989,836	87,050,465