XML 60 R47.htm IDEA: XBRL DOCUMENT
v3.25.2

WARRANTS - Convertible Preferred Stock Warrants Outstanding (Details) - Private Placement Warrant Liability - $ / shares | Jun. 30, 2025 | Mar. 05, 2025 | Feb. 14, 2025 | Dec. 31, 2024
--- | --- | --- | --- | ---
Class of Warrant or Right [Line Items] |  |  |  |
Exercise price (in dollar per share) |  | $ 10.00 | $ 10.00 |
Number of shares (in shares) | 1,843 |  |  | 250,000
Series A |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise price (in dollar per share) | $ 63.36 |  |  |
Number of shares (in shares) | 631 |  |  |
Series B |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise price (in dollar per share) | $ 229.99 |  |  |
Number of shares (in shares) | 434 |  |  |
Series E |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise price (in dollar per share) | $ 1,284.95 |  |  |
Number of shares (in shares) | 778 |  |  |

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: 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_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
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 No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=bslk_PrivatePlacementWarrantLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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