Reorganization Items, net - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2016
Reorganizations [Abstract]
Reorganization payments	$ 809,000	$ 2,300,000

The amount the Company paid for reorganization items.

No definition available.

Name:	siga_ReorganizationPayments
Namespace Prefix:	siga_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration