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Stock-Based Compensation - Summary of restricted stock awards outstanding (Details) - Restricted stock
shares in Thousands
3 Months Ended
Mar. 31, 2023
$ / shares
shares
Shares  
Unvested at beginning of period (in shares) | shares 1,679
Granted (in shares) | shares 1,358
Vested (in shares) | shares (316)
Canceled and forfeited (in shares) | shares (94)
Unvested at end of period (in shares) | shares 2,627
Weighted average grant date fair value  
Unvested at beginning of period (in dollars per share) | $ / shares $ 3.23
Granted (in dollars per share) | $ / shares 1.63
Vested (in dollars per share) | $ / shares 4.30
Canceled and forfeited (in dollars per share) | $ / shares 3.75
Unvested at end of period (in dollars per share) | $ / shares $ 4.75