Commitment and Contingencies - Additional Information (Details) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended		39 Months Ended
	Aug. 15, 2018 USD ($)	Aug. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Mar. 31, 2018 USD ($) HairDryer	Dec. 31, 2018 USD ($)	May 31, 2018 Consumer
Commitment And Contingencies [Line Items]
NET REVENUE			$ 40,603	$ 24,672	$ 88,817	$ 53,576	$ 6,200
Type of Revenue [Extensible List]							mwk:XtavaAllureHairDryerMember
Remaining recall liability			90		90			$ 1,512
Xtava Allure Hair Dryer
Commitment And Contingencies [Line Items]
Number of Product sold | HairDryer							170,000
Recall costs	$ 1,600				100
Legal matter yet to settle, remaining number of consumers | Consumer									1
Amount of recall liability eliminated, due to materially completed obligation		$ 1,400
Remaining recall liability			$ 100		$ 100