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Stock-Based Compensation - Stock Option Valuation (Details) - Stock options to purchase common stock
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Assumptions used to determine the fair value of stock options granted    
Risk‑free interest rate 4.00% 1.77%
Expected volatility 72.00% 71.00%
Expected dividend yield 0.00% 0.00%
Expected term (in years) 5 years 11 months 23 days 6 years 10 days