Revenue Recognition - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) Segment Program Obligation Source	Mar. 31, 2018 USD ($)
Disaggregation Of Revenue [Line Items]
Number of reportable segments | Segment	2
Revenue, Practical Expedient, Initial Application and Transition, Qualitative Assessment	true
Revenues	$ 214,094,000	$ 149,930,000
Healthcare
Disaggregation Of Revenue [Line Items]
Number of programs | Program	3
Number of performance obligations | Obligation	1
Number of performance obligation unsatisfied | Obligation	0
Revenue recognized from performance obligations satisfied in prior period	$ 0
Period of billing in arrears once timing of services to customers is known	1 month
Number of days for customer to make payment after being invoiced	30 days
Number of reportable segments | Segment	2
Revenues	$ 156,527,000	$ 149,930,000
Nutrition
Disaggregation Of Revenue [Line Items]
Number of sources for revenue recognition | Source	4
Description of return of obligation	Direct to consumer customers may return unopened ready-to-go products within 30 days after purchase in order to receive a refund or credit.
Return of purchase order to refund or credit, period	30 days
Purchase order canceled of delivery, period	14 days
Revenues	$ 57,567,000
Provision for estimated returns	1,400,000
Nutrition | Accrued Liabilities
Disaggregation Of Revenue [Line Items]
Reserve for estimated returns	1,300,000
Nutrition | Shipping and Handling Charges
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,800,000