The term of debt instrument interest payment.

No definition available.

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

- Definition

Percentage of penalty to be paid on the event of default in meeting the obligation.

+ References

No definition available.

+ Details

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Namespace Prefix:	tela_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash required to be maintained as part of security in relation to debt.

+ References

No definition available.

+ Details

Name:	tela_MinimumCashBalanceRequiredToBeMaintained
Namespace Prefix:	tela_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of tranches of debt obtained.

+ References

No definition available.

+ Details

Name:	tela_NumberOfTranches
Namespace Prefix:	tela_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of exit fee to be paid on the principal amount at the time of maturity or prepayment.

+ References

No definition available.

+ Details

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Namespace Prefix:	tela_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of penalty to be paid on principal amount of debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	tela_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of administrative fee to be paid on last day of each quarter.

+ References

No definition available.

+ Details

Name:	tela_QuarterlyAdministrativeFee
Namespace Prefix:	tela_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=tela_OrbimedTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=tela_PriorToSecondAnniversaryMember
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- Details

Name:	srt_StatementScenarioAxis=tela_AfterSecondAnniversaryButPriorToThirdAnniversaryMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=tela_AfterThirdAnniversaryMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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- Details

Name:	us-gaap_DebtInstrumentAxis=tela_OrbimedTermLoansTrancheOneMember
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- Details

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Namespace Prefix:
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Debt - OrbiMed Term Loan (related party) (Details)	12 Months Ended
Debt - OrbiMed Term Loan (related party) (Details)	Dec. 31, 2019 USD ($) tranche	Dec. 31, 2018 USD ($)	Nov. 30, 2018 USD ($)
OrbiMed Term Loans (related party)
Debt
Number of Tranches \| tranche	2
Minimum Cash Balance	$ 2,000,000
Interest due to unpaid obligation	3.00%
Interest Rate (as a percent)	9.75%		7.75%
Number of Installment	60 months
Exit fee (as a percent)	10.00%
Administration Fees	$ 10,000
Debt issuance costs	300,000
Interest Expenses	$ 3,600,000	$ 600,000
OrbiMed Term Loans (related party) \| Prior to second anniversary
Debt
Percentage of prepayment penalty on prepaid principal amount	10.00%
OrbiMed Term Loans (related party) \| After second anniversary but prior to third anniversary
Debt
Percentage of prepayment penalty on prepaid principal amount	5.00%
OrbiMed Term Loans (related party) \| After third anniversary
Debt
Percentage of prepayment penalty on prepaid principal amount	2.50%
OrbiMed Term Loans (related party) \| LIBOR
Debt
Interest Rate (as a percent)	2.00%
OrbiMed Term Loans (related party) \| Maximum
Debt
Debt Amount			$ 35,000,000
Tranche One
Debt
Debt Amount			30,000,000
Tranche Two
Debt
Debt Amount			$ 5,000,000