Basis of Presentation and Summary of Significant Accounting Policies - Net Loss per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
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)	220	11	201	56
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	175	175	289
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)		41		60