Stock-based Compensation - Summary of PSU Activity (Details) - PSU
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Number of Shares  
Unvested at beginning of period (in shares) | shares 297,789
Granted (in shares) | shares 336,100
Vested (in shares) | shares 0
Forfeited (in shares) | shares (74,442)
Unvested at end of period (in shares) | shares 559,447
Weighted Average Fair Value  
Unvested at beginning of period (in dollars per share) | $ / shares $ 1.36
Granted (in dollars per share) | $ / shares 1.21
Vested (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 1.36
Unvested at end of period (in dollars per share) | $ / shares $ 1.27