Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	1,897,613		1,897,613		1,867,747
Options exercisable period			10 years
Weighted-average grant date fair value of options granted			$ 5.67
Options granted			195,975	0
Total unrecognized compensation expense related to unvested options	$ 13,700		$ 13,700
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period			2 years 3 months 4 days
Share based compensation expense	$ 7,716	$ 141	$ 11,835	$ 482
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%
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards outstanding to purchase common stock	2,575,982		2,575,982
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period			1 year 9 months
Share based compensation expense	$ 6,200		$ 7,400
Total fair value of shares vested			$ 0
Shares, Vested			0
Weighted Average Grant-Date Fair Value, Granted			$ 18.89
Total unrecognized compensation expense related to unvested restricted shares	$ 41,300		$ 41,300
Shares, Granted			2,645,123
Mohawk 2014 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	366,790		366,790
Shares reserved for future issuance	2,608		2,608
Mohawk 2018 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance	27,366		27,366
Mohawk 2018 Plan | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	1,530,823		1,530,823
Mohawk 2018 Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards outstanding to purchase common stock	149,957		149,957
Shares, Granted			149,957
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]
Aggregate shares of restricted stock outstanding	2,426,025		2,426,025