Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	1,894,862		1,894,862		1,867,747
Options exercisable period			10 years
Options granted to purchase			131,905	0
Cancellation of options to purchase common stock			104,746
Options exercised			44
Weighted-average grant date fair value of options granted			$ 5.94
Total unrecognized compensation expense related to unvested options	$ 15,300		$ 15,300
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period			2 years 3 months
Share based compensation expense	$ 2,619	$ 177	$ 4,119	$ 341
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	2,491,007		2,491,007
Total unrecognized compensation expense related to unvested options, expects to recognize over estimated weighted average period			1 year 11 months 12 days
Shares, Granted			2,560,148
Shares, Forfeited			69,141
Share based compensation expense			$ 1,200
Total fair value of shares vested			$ 0
Shares, Vested			0
Weighted Average Grant-Date Fair Value, Granted			$ 19.26
Total unrecognized compensation expense related to unvested restricted shares	$ 46,800		$ 46,800
Mohawk 2014 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	328,959		328,959
Shares reserved for future issuance	40,882		40,882
Mohawk 2018 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance	77,261		77,261
Mohawk 2018 Plan | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding to purchase common stock	1,565,903		1,565,903
Mohawk 2018 Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards outstanding to purchase common stock	64,982		64,982
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
2018 Equity Incentive Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Granted			64,982