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Related Party Transactions - Additional Information (Details) | 1 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) | Feb. 29, 2020 shares | Jan. 31, 2019 ft² | Dec. 31, 2017 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Feb. 28, 2019 USD ($) | Jul. 31, 2018 USD ($) | May 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities, related party amounts |  |  |  |  | $ 10,000 | $ 0 |  |  |
Convertible notes issued |  |  |  |  |  |  | $ 200,000 |  |
Debt instrument interest rate |  |  |  |  |  |  | 8.00% |  |
Percentage of selling price per share that can convertible into equity securities sold |  |  |  |  |  |  | 80.00% |  |
Lease Agreement |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Prepaid expenses |  |  |  |  | 100,000 | 0 |  |  |
Accrued expenses and other current liabilities, related party amounts |  |  |  |  |  | 0 |  |  |
Lease Agreement | Maximum |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities, related party amounts |  |  |  |  | 100,000 |  |  |  |
Consulting Agreements |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  | $ 20,000 | $ 20,000 |  |  |
Marlinspike Group, LLC | 2020 Consulting Agreement |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Monthly fee for consultancy services | $ 20,000 |  |  |  |  |  |  |  |
Termination fee | $ 240,000 |  |  |  |  |  |  |  |
Marlinspike Group, LLC | Carlsbad, California | 2019 Consulting Agreement |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Area of office space | ft² |  |  | 2,120 |  |  |  |  |  |
Aseem Z. Ansari, Ph.D. | Convertible Notes and Notes Payable |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Convertible notes issued |  |  |  |  |  |  |  | $ 300,000 | $ 300,000
Debt instrument interest rate |  |  |  |  |  |  |  |  | 8.00%
Percentage of selling price per share that can convertible into equity securities sold |  |  |  |  |  |  |  |  | 80.00%
Aseem Z. Ansari, Ph.D. | Convertible Notes and Notes Payable | Series A Preferred Stock |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Convertible preferred stock converted | shares |  | 171,025 |  |  |  |  |  |  |
Aseem Z. Ansari, Ph.D. | May Note |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Maturity description |  |  |  |  | on or after February 5, 2021, if not converted earlier |  |  |  |
Aseem Z. Ansari, Ph.D. | July Note |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Maturity description |  |  |  |  | on or after February 5, 2021, if not converted earlier |  |  |  |
Aseem Z. Ansari, Ph.D. | Consulting Agreements |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Monthly fee for services |  |  |  | $ 15,000 |  |  |  |  |

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