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Stock Based Compensation - Summary of Activity Related to Restricted Stock and Deferred Stock Units Granted (Details) - Stock Units
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Number of Shares  
Number of Shares, Nonvested, January 1,2021 | shares 1,014,123
Number of Shares, Granted | shares 438,316
Number of Shares, Vested | shares (329,198)
Number of Shares, Cancelled | shares (5,354)
Number of Shares, Nonvested, September 30, 2021 | shares 1,117,887
Weighted Average Grant Date Fair Value  
Weighted Average Grand Date Fair Value, Nonvested, January 1, 2021 | $ / shares $ 1.50
Weighted Average Grand Date Fair Value, Granted | $ / shares 2.07
Weighted Average Grand Date Fair Value, Vested | $ / shares 1.67
Weighted Average Grand Date Fair Value, Cancelled | $ / shares 1.97
Weighted Average Grand Date Fair Value, Nonvested, September 30, 2021 | $ / shares $ 1.67