Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Summary of Stock Option Activity (Details)

v3.22.2
Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Options Outstanding 144,303 264,443  
Options granted 0 2,600  
Options exercised (707) (54,116)  
Options forfeited (23,171) (51,079)  
Options cancelled (25,012) (17,545)  
Options Outstanding 95,413 144,303 264,443
Options Vested and expected to vest at December 31, 2021 95,413    
Options exercisable at December 31, 2021 61,130    
Outstanding, Weighted average exercise price per share $ 36.37 $ 35.00  
Options granted, Weighted average exercise price per share   8.58  
Options exercised, Weighted average exercise price per share 7.50 7.06  
Options forfeited, Weighted average exercise price per share 27.55 47.27  
Options cancelled, Weighted average exercise price per share 29.60 70.44  
Outstanding, Weighted average exercise price per share 40.00 $ 36.37 $ 35.00
Vested and expected to vest at December 31, 2021, Weighted average exercise price per share 40.00    
Exercisable at December 31, 2021, Weighted average exercise price per share $ 44.34    
Outstanding, Weighted average remaining contractual life (in years) 6 years 8 months 23 days 7 years 9 months 25 days 8 years 6 months 3 days
Vested and expected to vest at December 31, 2021, Weighted average remaining contractual life (in years) 6 years 8 months 15 days    
Exercisable at December 31, 2021, Weighted average remaining contractual life (in years) 6 years 18 days    
Outstanding, Aggregate Intrinsic Value [1] $ 0 $ 24 $ 4,184
Vested and expected to vest at December 31, 2021, Aggregate Intrinsic Value [1] 0    
Exercisable at December 31, 2021, Aggregate Intrinsic Value [1] $ 0    
[1] The intrinsic value is calculated as the difference between the exercise price and the fair value of the common stock on the balance sheet date.