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Leases - Narrative (Details) $ in Millions		3 Months Ended
	Jul. 17, 2024 renewal_option	Mar. 31, 2025 USD ($) lease renewal_option
Lessee, Lease, Description [Line Items]
Number of leases | lease		2
Lessee, number of finance leases | lease		2
Westminster Facility
Lessee, Lease, Description [Line Items]
Number of lease renewal options | renewal_option	2	1
Lease renewal term	5 years	5 years
Number of lease renewal options exercised | renewal_option	1
Rent payments | $		$ 1.5
Bannockburn Facility
Lessee, Lease, Description [Line Items]
Lease renewal term		3 years

X

- Definition

Lessee, Number Of Finance Leases

+ References

No definition available.

+ Details

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Namespace Prefix:	tlsi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Lessee, Number Of Operating Leases

+ References

No definition available.

+ Details

Name:	tlsi_LesseeNumberOfOperatingLeases
Namespace Prefix:	tlsi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Lessee, Operating Lease, Number Of Renewal Options

+ References

No definition available.

+ Details

Name:	tlsi_LesseeOperatingLeaseNumberOfRenewalOptions
Namespace Prefix:	tlsi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, Operating Lease, Number Of Renewal Options Exercised

+ References

No definition available.

+ Details

Name:	tlsi_LesseeOperatingLeaseNumberOfRenewalOptionsExercised
Namespace Prefix:	tlsi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-6

+ Details

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

X

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_LeaseContractualTermAxis=tlsi_WestminsterFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LeaseContractualTermAxis=tlsi_BannockburnFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: