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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation Expense We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Stock-based compensation expense$2,166 $522 $4,280 $1,380