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

Business combination deferred consideration payment period.

No definition available.

Name:	sien_BusinessCombinationDeferredConsiderationPaymentPeriod
Namespace Prefix:	sien_
Data Type:	xbrli:durationItemType
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Period Type:	duration

Represents the number of years for the deferred consideration and contingent consideration consisting of future royalty payments to be paid on a quarterly basis by the entity, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	sien_BusinessCombinationRoyaltyPaymentsPeriodForPayment
Namespace Prefix:	sien_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The estimated future obligation of deferred consideration due by entity.

No definition available.

Name:	sien_DeferredConsiderationEstimatedFutureObligation
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Number of contingent payments.

No definition available.

Name:	sien_NumberOfContingentPayments
Namespace Prefix:	sien_
Data Type:	xbrli:integerItemType
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Period Type:	duration

Date when the business acquisition agreement was executed, in CCYY-MM-DD format.

No definition available.

Name:	us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
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Data Type:	xbrli:dateItemType
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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e845-128460

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-Section 50
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Balance Type:	na
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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.

No definition available.

Name:	us-gaap_BusinessAcquisitionLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

No definition available.

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460

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Balance Type:	debit
Period Type:	duration

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Name:	us-gaap_BusinessCombinationConsiderationTransferred1
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_BusinessAcquisitionAxis=sien_MiraDryIncorporationMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_BusinessAcquisitionAxis=sien_USRightsToBiocorneumFromEnaltusLlcMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_BusinessAcquisitionAxis=sien_TissueExpanderPortfolioFromSpecialtySurgicalProductsIncMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
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Data Type:	na
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Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
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