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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Revenue Recognition - Summary of Revenue Disaggregated by Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenues	$ 303,897	$ 151,467	$ 858,369	$ 453,261
Nutrition
Disaggregation Of Revenue [Line Items]
Revenues	143,918		384,382
Nutrition \| Direct to Consumer
Disaggregation Of Revenue [Line Items]
Revenues	134,581		357,677
Nutrition \| Retail
Disaggregation Of Revenue [Line Items]
Revenues	6,311		19,343
Nutrition \| QVC
Disaggregation Of Revenue [Line Items]
Revenues	2,882		6,926
Nutrition \| Other
Disaggregation Of Revenue [Line Items]
Revenues	$ 144		$ 436