XML 184 R164.htm IDEA: XBRL DOCUMENT
v3.23.3

Convertible Preferred Stock - 2023 Financing (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2023 USD ($) shares | Mar. 31, 2023 USD ($) item $ / shares shares | Jul. 31, 2021 USD ($) shares | Mar. 31, 2021 USD ($) shares | Nov. 30, 2020 USD ($) shares | Mar. 31, 2023 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2023 | Oct. 31, 2022 shares
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Proceeds from exercise of Series B preferred stock warrants | $ |  |  |  |  |  |  | $ 9,630 | $ 0 | $ 117 |  |
Series A-1 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.275 | 1.155
Series A-2 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.290 | 1.173
Series A-3 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.303 | 1.162
Series A-4 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.277 | 1.165
Series A-5 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.333 | 1.189
Series A-6 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  |  |  |  | 59,102 |  |  |  |  |  |
Proceeds from exercise of Series B preferred stock warrants | $ |  |  |  |  | $ 19 |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.351 | 1.190
Series B preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  |  | 289,552 | 289,552 |  |  |  |  |  |  |
Proceeds from exercise of Series B preferred stock warrants | $ |  |  | $ 117 | $ 117 |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.250 | 1.154
Series B-1 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1.296 | 1.167
Series B-2 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1 | 1
Series B-3 preferred stock |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares | 2,239,309 |  |  |  |  |  |  |  |  |  |
Proceeds from exercise of Series B preferred stock warrants | $ | $ 4,530 |  |  |  |  |  |  |  |  |  |
Exchange ratios |  |  |  |  |  |  |  |  |  | 1 | 1
Series B-3 preferred stock | B-2 Preferred Stock Financing, Second tranche, closings |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 2,075,417
Series B-3 preferred stock | B-2 Preferred Stock Financing, Second tranche, closing one |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  | 830,167 |  |  |  | 830,167 |  |  |  |  |
Subsequent Event | B-2 Preferred Stock Financing, Second tranche, closings |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Number of closings effectuated | item |  | 2 |  |  |  |  |  |  |  |  |
Subsequent Event | B-2 Preferred Stock Financing, Second tranche, closing one |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Percentage of shares committed sold |  | 40.00% |  |  |  |  |  |  |  |  |
Aggregate purchase price | $ |  | $ 2,939 |  |  |  |  |  |  |  |  |
Subsequent Event | B-2 Preferred Stock Financing, Second tranche, closing two |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Percentage of shares committed sold |  | 3.00% |  |  |  |  |  |  |  |  |
Aggregate purchase price | $ |  | $ 250 |  |  |  |  |  |  |  |  |
Subsequent Event | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Proceeds from exercise of Series B preferred stock warrants | $ |  |  |  |  |  | $ 4,715 |  |  |  |  |
Subsequent Event | Series A-1 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 41.27 |  |  |  | $ 41.27 |  |  |  |  |
Exchange ratios |  | 1.200 |  |  |  | 1.200 |  |  |  |  |
Subsequent Event | Series A-2 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 12.95 |  |  |  | $ 12.95 |  |  |  |  |
Exchange ratios |  | 1.209 |  |  |  | 1.209 |  |  |  |  |
Subsequent Event | Series A-3 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 14.16 |  |  |  | $ 14.16 |  |  |  |  |
Exchange ratios |  | 1.229 |  |  |  | 1.229 |  |  |  |  |
Subsequent Event | Series A-4 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 13.36 |  |  |  | $ 13.36 |  |  |  |  |
Exchange ratios |  | 1.200 |  |  |  | 1.200 |  |  |  |  |
Subsequent Event | Series A-5 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 14.16 |  |  |  | $ 14.16 |  |  |  |  |
Exchange ratios |  | 1.257 |  |  |  | 1.257 |  |  |  |  |
Subsequent Event | Series A-6 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 16.19 |  |  |  | $ 16.19 |  |  |  |  |
Exchange ratios |  | 1.250 |  |  |  | 1.250 |  |  |  |  |
Subsequent Event | Series B preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 10.12 |  |  |  | $ 10.12 |  |  |  |  |
Exchange ratios |  | 1.200 |  |  |  | 1.200 |  |  |  |  |
Subsequent Event | Series B-1 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 11.74 |  |  |  | $ 11.74 |  |  |  |  |
Exchange ratios |  | 1.207 |  |  |  | 1.207 |  |  |  |  |
Subsequent Event | Series B-2 preferred stock | B-2 Preferred Stock Financing, Second tranche, closing one |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Number of shares sold | shares |  | 207,541 |  |  |  |  |  |  |  |  |
Subsequent Event | Series B-2 preferred stock | B-2 Preferred Stock Financing, Second tranche, closing two |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Number of shares sold | shares |  | 17,656 |  |  |  |  |  |  |  |  |
Subsequent Event | Series B-2 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 0.35 |  |  |  | $ 0.35 |  |  |  |  |
Exchange ratios |  | 1 |  |  |  | 1 |  |  |  |  |
Subsequent Event | Series B-3 preferred stock | B-2 Preferred Stock Financing, Second tranche, closing two |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  | 70,624 |  |  |  | 70,624 |  |  |  |  |
Subsequent Event | Series B-3 preferred stock | 2023 Financing |  |  |  |  |  |  |  |  |  |  |
Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Warrants to purchase Series B-3 preferred stock (in shares) | shares |  | 2,330,811 |  |  |  | 2,330,811 |  |  |  |  |
Conversion prices of the Company's preferred stock |  | $ 0.05 |  |  |  | $ 0.05 |  |  |  |  |
Exchange ratios |  | 1 |  |  |  | 1 |  |  |  |  |

X
- Definition Number of closings of stock offerings effectuated during the period. + References No definition available. + Details
Name: | tlsi_NumberOfStockOfferingClosingsEffectuated
Namespace Prefix: | tlsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of shares committed by the company sold during the period. + References No definition available. + Details
Name: | tlsi_PercentageOfSharesCommittedSold
Namespace Prefix: | tlsi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock classified as temporary equity issued during the period. + References No definition available. + Details
Name: | tlsi_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | tlsi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References 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

X
- Definition Per share conversion price of preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockConvertibleConversionPrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of common shares issuable upon conversion for each share of preferred stock to be converted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockConvertibleConversionRatio
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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

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 No definition available. + Details
Name: | us-gaap_TemporaryEquityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesA1ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesA2ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesA3ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesA4ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesA5ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesB1ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesB2ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=tlsi_SeriesB3ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=tlsi_B2PreferredStockFinancingSecondTrancheClosingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=tlsi_B2PreferredStockFinancingSecondTrancheClosingOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=tlsi_B2PreferredStockFinancingSecondTrancheClosingTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=tlsi_Financing2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |