Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Commitment and Contingencies - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended		39 Months Ended
	Aug. 15, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($) HairDryer	Dec. 31, 2018 USD ($)	May 31, 2018 Consumer
Commitment And Contingencies [Line Items]
NET REVENUE		$ 30,368	$ 14,588	$ 48,213	$ 28,904	$ 6,200
Type of Revenue [Extensible List]						mwk:XtavaAllureHairDryerMember
Remaining recall liability		1,495		1,495			$ 1,512
Xtava Allure Hair Dryer
Commitment And Contingencies [Line Items]
Number of Product sold \| HairDryer						170,000
Recall costs	$ 1,600
Legal and other expenses	$ 400
Legal matter yet to settle, remaining number of consumers \| Consumer								1
Remaining recall liability		$ 1,500		$ 1,500