Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromWarrantExercises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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

- Details

Name:	us-gaap_StatementClassOfStockAxis=tlsi_SeriesA6ConvertiblePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=tlsi_SeriesBConvertiblePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Convertible Preferred Stock, Warrant Exercises (Details) - USD ($) $ in Thousands	1 Months Ended			9 Months Ended		12 Months Ended
	Jul. 31, 2021	Mar. 31, 2021	Nov. 30, 2020	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2021
Convertible Preferred Stock
Proceeds from exercise of Series B preferred stock warrants				$ 9,630	$ 0	$ 117
Series A-6 preferred stock
Convertible Preferred Stock
Proceeds from exercise of Series B preferred stock warrants			$ 19
Warrants to purchase Series B-3 preferred stock (in shares)			59,102
Series B preferred stock
Convertible Preferred Stock
Proceeds from exercise of Series B preferred stock warrants	$ 117	$ 117
Warrants to purchase Series B-3 preferred stock (in shares)	289,552	289,552