Warrant liability.

No definition available.

Name:	FUSE_WarrantLiability
Namespace Prefix:	FUSE_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-10

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

+ References

+ Details

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

- References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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Schedule of Financial Instruments Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Liabilities:
Related Party convertible Notes Payable, at fair value (Refer Note 10. Long-Term Debt)				$ 16,950	$ 13,968	$ 15,510
Forward purchase Derivative liability	8,084	$ 8,104	9,692
Fair Value, Recurring [Member]
Liabilities:
Related Party convertible Notes Payable, at fair value (Refer Note 10. Long-Term Debt)						6,524
Convertible Notes at Fair Value (Refer Note 10. Long-Term Debt)						8,986
Warrant Liability	72		121			945
Forward purchase Derivative liability	8,084		9,692
Liabilities	8,156		9,813			16,455
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Liabilities:
Related Party convertible Notes Payable, at fair value (Refer Note 10. Long-Term Debt)
Convertible Notes at Fair Value (Refer Note 10. Long-Term Debt)
Warrant Liability
Forward purchase Derivative liability
Liabilities
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Liabilities:
Related Party convertible Notes Payable, at fair value (Refer Note 10. Long-Term Debt)
Convertible Notes at Fair Value (Refer Note 10. Long-Term Debt)
Warrant Liability
Forward purchase Derivative liability
Liabilities
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Liabilities:
Related Party convertible Notes Payable, at fair value (Refer Note 10. Long-Term Debt)						6,524
Convertible Notes at Fair Value (Refer Note 10. Long-Term Debt)						8,986
Warrant Liability	72		121			945
Forward purchase Derivative liability	8,084		9,692
Liabilities	$ 8,156		$ 9,813			$ 16,455