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Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
May 08, 2020
Mar. 12, 2020
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options exercisable period             10 years  
Total unrecognized compensation expense related to unvested options     $ 6,200       $ 6,200  
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period             1 year 10 days  
Options granted to purchase             0 195,975
Cancellation of options to purchase common stock             276,420 165,622
Options exercised             2,870 487
Share based compensation expense     $ 4,861   $ 11,374   $ 17,472 $ 24,747
Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period             7 months 13 days  
Shares forfeited 134,366 371,329 14,000       519,695  
Share based compensation expense       $ 3,300 $ 9,800 $ 12,900   $ 20,300
Restricted shares vested             416,953 0
Weighted Average Grant-Date Fair Value, Granted     $ 6.34       $ 3.82  
Total unrecognized compensation expense related to unvested restricted shares     $ 6,500       $ 6,500  
Shares, Granted             691,709  
Share-based Compensation Award, Tranche One                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting period             4 years  
Share-based Compensation Award, Tranche One | Vesting on First Anniversary                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting percentage             25.00%  
Share-based Compensation Award, Tranche One | Vesting Over Succeeding 36 Months                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting period             36 months  
Options vesting percentage             75.00%  
Share-based Compensation Award, Tranche Two                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting period             3 years  
Share-based Compensation Award, Tranche Two | Vesting on First Anniversary                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting percentage             33.33%  
Share-based Compensation Award, Tranche Two | Vesting Over Succeeding 24 Months                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Options vesting period             24 months  
Options vesting percentage             66.66%  
Mohawk 2014 Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Shares reserved for future issuance     56,327       56,327  
Mohawk 2018 Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Shares reserved for future issuance     1,002,522       1,002,522  
Mohawk 2018 Plan | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Shares, Granted             400,000  
2019 Equity Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Shares reserved for future issuance     0       0  
2019 Equity Plan | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage of restricted shares issued and outstanding             70.00%  
2019 Equity Plan | Share-based Compensation Award, Tranche One | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Award vesting date             Mar. 13, 2020  
2019 Equity Plan | Share-based Compensation Award, Tranche Two | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Award vesting date             Dec. 15, 2020  
2019 Equity Plan | Share-based Compensation Award, Tranche Three | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Award vesting date             Jan. 02, 2021  
2019 Equity Plan | Share-based Compensation Award, Tranche Four | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Award vesting date             Jul. 01, 2021