Final order and judgment entered by the Court awarding damages to the Plaintiff.

No definition available.

Name:	siga_FinalOrderAndJudgment
Namespace Prefix:	siga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Final order and judgment post-judgment interest entered by the Court awarding damages to the Plaintiff.

+ References

No definition available.

+ Details

Name:	siga_FinalOrderAndJudgmentPostJudgmentInterest
Namespace Prefix:	siga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Final Order and Judgment entered by the Court awarding expectation damages, plus pre-judgment interest, and certain permitted legal fees, costs, and expenses to Plaintiff.

+ References

No definition available.

+ Details

Name:	siga_Finalorderandjudgmentplusinterest
Namespace Prefix:	siga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of tecovirimat, also known as ST-246, courses to be delivered to the U.S. Strategic National Stockpile

+ References

No definition available.

+ Details

Name:	siga_NumberOfCoursesToBeDelivered1
Namespace Prefix:	siga_
Data Type:	xbrli:integerItemType
Balance Type:	na
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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LitigationCaseAxis=siga_LicenseAgreementLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_SettledLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	siga_ProcurementContractAxis=siga_BardaContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details)	1 Months Ended	6 Months Ended
Commitments and Contingencies (Details)	May 31, 2011 course	Jun. 30, 2017 course	Nov. 16, 2016 USD ($)	Dec. 23, 2015 USD ($)	Jan. 15, 2015 USD ($)
License Agreement litigation \| Settled Litigation
Loss Contingencies [Line Items]
Final order and judgment					$ 195,000,000
Final order and judgment post-judgment interest				$ 30,663.89
Final order and judgment including interest			$ 217,000,000
BARDA Contract
Loss Contingencies [Line Items]
Number of courses to be delivered \| course	2,000,000	2,000,000