Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Income tax expense/(benefit) from continuing operations	$ 0	$ 0		$ 0	$ 0
Change in accounting principle, accounting standards update, adopted [true false]	true			true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021			Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true			true
Accounting Standards Update [Extensible List]			ASC 326	ASU 2019-12