Summary of Significant Accounting Policies - Liquidity - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounting Policies [Abstract]
Net income (loss) attributable to parent	$ (19,251)	$ (17,318)
Accumulated deficit	$ 1,916,135		$ 1,915,556

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

+ References + Details