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Subsequent Events (Details) - Subsequent Event
$ / shares in Units, $ in Millions
Oct. 22, 2021
USD ($)
$ / shares
Oct. 18, 2021
USD ($)
employee
Subsequent Event [Line Items]    
Reduction in workforce (percentage)   40.00%
Reduction in workforce employees | employee   170
Costs related to the reduction   $ 6.2
Expected cash payments for severance costs and related expenses   $ 6.2
Convertible Senior Notes Due 2025 | Convertible Debt    
Subsequent Event [Line Items]    
Exchange Agreement, amount of principal amount converted into common stock $ 15.0  
Exchange Agreement, weighted average price per share floor (in dollars per share) | $ / shares $ 5.62  
Exchange Agreement, threshold trading days 5 days