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Note 2 - Summary of Significant Accounting Policies 1 (Details Textual) $ in Millions	Mar. 31, 2025 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 115.9
Unbilled Receivables, Current	$ 0.9
Research and Development [Member]
Revenue, Performance Obligation, Number of Obligations	4
Manufacture and Delivery [Member]
Revenue, Performance Obligation, Number of Obligations	4

X

- Definition

Represents the number of performance obligations.

+ References

No definition available.

+ Details

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Namespace Prefix:	siga_
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Balance Type:	na
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X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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