Basis of Presentation and Summary of Significant Accounting Policies - Net Loss per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Options
Impairment Effects on Earnings Per Share [Line Items]
Securities excluded from net loss per share calculation (less than for options in the three months ended June 30, 2020) (in shares)		79
Warrants
Impairment Effects on Earnings Per Share [Line Items]
Securities excluded from net loss per share calculation (less than for options in the three months ended June 30, 2020) (in shares)	16	106
Restricted share units
Impairment Effects on Earnings Per Share [Line Items]
Securities excluded from net loss per share calculation (less than for options in the three months ended June 30, 2020) (in shares)		2
Convertible securities
Impairment Effects on Earnings Per Share [Line Items]
Securities excluded from net loss per share calculation (less than for options in the three months ended June 30, 2020) (in shares)	175	519