Represents the number of largest individual customers, including members of a marketing group.

No definition available.

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Namespace Prefix:	tvty_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Segment reporting information percentage of revenues located in country of origin.

+ References

No definition available.

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Description of risks that arise due to the volume of business transacted with a particular supplier or reliance placed on that supplier. At a minimum, the description informs financial statement users of the general nature of the risk.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=99380358&loc=d3e7102-108593

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6327-108592

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Segment Disclosures and Concentrations of Risk - Additional Information (Details)		10 Months Ended	12 Months Ended
	Mar. 07, 2019 Segment	Dec. 31, 2019 Segment	Dec. 31, 2019 Segment Customer	Dec. 31, 2018 Customer	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Number of reportable segments \| Segment	1	2	2
Percentage of revenue from external customers in united states			99.80%	100.00%	100.00%
Healthcare
Revenue, Major Customer [Line Items]
Number of reportable segments \| Segment			2
Customer Concentration Risk \| Revenues
Revenue, Major Customer [Line Items]
Number of largest individual customers				3
Customer Concentration Risk \| Revenues \| Healthcare
Revenue, Major Customer [Line Items]
Number of largest individual customers			1
Customer Concentration Risk \| Revenues \| Customer One
Revenue, Major Customer [Line Items]
Percentage of concentration risk				20.00%
Customer Concentration Risk \| Revenues \| Customer One \| Healthcare
Revenue, Major Customer [Line Items]
Percentage of concentration risk			13.00%
Customer Concentration Risk \| Revenues \| Customer Two
Revenue, Major Customer [Line Items]
Percentage of concentration risk				14.60%
Customer Concentration Risk \| Revenues \| Customer Three
Revenue, Major Customer [Line Items]
Percentage of concentration risk				10.00%
Customer Concentration Risk \| Accounts Receivable, Net
Revenue, Major Customer [Line Items]
Number of largest individual customers				2
Customer Concentration Risk \| Accounts Receivable, Net \| Healthcare
Revenue, Major Customer [Line Items]
Number of largest individual customers			2
Customer Concentration Risk \| Accounts Receivable, Net \| Customer One
Revenue, Major Customer [Line Items]
Percentage of concentration risk				26.00%
Customer Concentration Risk \| Accounts Receivable, Net \| Customer One \| Healthcare
Revenue, Major Customer [Line Items]
Percentage of concentration risk			16.00%
Customer Concentration Risk \| Accounts Receivable, Net \| Customer Two
Revenue, Major Customer [Line Items]
Percentage of concentration risk				13.00%
Customer Concentration Risk \| Accounts Receivable, Net \| Customer Two \| Healthcare
Revenue, Major Customer [Line Items]
Percentage of concentration risk			31.00%
Single Supplier \| Inventory Purchase \| Nutrition
Revenue, Major Customer [Line Items]
Percentage of concentration risk			12.00%
Number of suppliers			single supplier
Third Party Fulfillment Provider Concentration \| Fulfillment Cost \| Nutrition
Revenue, Major Customer [Line Items]
Percentage of concentration risk			100.00%
Direct Shipping Provider \| Direct Shipping Cost \| Nutrition
Revenue, Major Customer [Line Items]
Percentage of concentration risk			97.50%
Third Party Retail Shipping Provider \| Retail Shipping Costs \| Nutrition
Revenue, Major Customer [Line Items]
Percentage of concentration risk			91.20%