Summary of Significant Accounting Policies - Additional Information (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($) Segment Institution	Sep. 30, 2020 USD ($)	Dec. 31, 2021
Segment and Geographic Information
Number of operating segments | Segment	1
Cash Equivalents
Cash Equivalents	$ 114,600,000
Concentration of Credit Risk
Number of financial institutions that hold the Company's cash | Institution	1
Equipment
Estimated useful life	3 years
Income Taxes
Income tax benefit	$ 0	$ 0
2019-12
Recent Accounting Pronouncements
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect	true
2020-10
Recent Accounting Pronouncements
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect	true
Forecast
Income Taxes
Effective tax rate			0.00%