Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized (Details)

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Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock-based compensation expense by type of award:      
Stock-based compensation expense $ 10,943 $ 8,203 $ 9,129
Stock Option Plan Awards      
Stock-based compensation expense by type of award:      
Stock-based compensation expense   709 2,977
Restricted stock units and restricted stock awards      
Stock-based compensation expense by type of award:      
Stock-based compensation expense 10,229 6,717 5,413
Employee Stock Purchase Plan      
Stock-based compensation expense by type of award:      
Stock-based compensation expense $ 714 $ 777 $ 739