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Stock-Based Compensation - Restricted Stock Units (Details) - Restricted Stock Units - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares      
Beginning balance (in shares) 491 11,301  
Released (in shares) (491) (10,810)  
Ending balance (in shares) 0 491  
Weighted Average Grant Date Fair Value Per Share      
Beginning weighted average grant date fair value (in dollars per share) $ 0 $ 147.60  
Released (in dollars per share) 147.60 9.37  
Ending weighted average grant date fair value (in dollars per share) $ 147.60 $ 15.38  
Intrinsic value, outstanding $ 0 $ 7,641 $ 14,013