Procurement Contract and Research Agreements	6 Months Ended
Jun. 30, 2017
Research and Development [Abstract]
Procurement Contract and Research Agreements	3. Procurement Contract and Research Agreements Procurement Contract On May 13, 2011, the Company signed a contract with the U.S. Biomedical Advanced Research and Development Authority (“BARDA”) pursuant to which SIGA agreed to deliver two million courses of TPOXX® to the Strategic Stockpile. The contract with BARDA (as modified, the “BARDA Contract”) is worth approximately $472.3 million, including $409.8 million related to the manufacture and delivery of 1.7 million courses of TPOXX® and $62.5 million of potential reimbursements connected to development and supportive activities (the “Base Contract”). Under the Base Contract, BARDA has agreed to buy from the Company 1.7 million courses of TPOXX®. Additionally, the Company expects to contribute to BARDA 300,000 courses at no additional cost to BARDA. A total of 2.0 million courses of TPOXX® is required to be delivered to the Strategic Stockpile in order for the Company to be eligible to receive the $40.9 million hold back payment (see description of hold back payment below). For courses of TPOXX® that are physically delivered to the Strategic Stockpile, the Company has replacement obligations, at no cost to BARDA, in the event that the final version of TPOXX® approved by the FDA is different from any courses of TPOXX® that have been delivered to the Strategic Stockpile or if TPOXX® does not meet any specified label claims, fails release testing or does not meet the 38-month expiry period (from time of delivery to the Strategic Stockpile), or if TPOXX® is recalled or deemed to be recalled for any reason. As of June 30, 2017, the Company has received $368.9 million under the Base Contract related to the manufacture and physical delivery of courses of TPOXX®. Included in this amount are a $41.0 million advance payment in 2011 for the completion of certain planning and preparatory activities related to the Base Contract, a $12.3 million milestone payment in 2012 for the completion of the product labeling strategy for TPOXX®, an $8.2 million milestone payment in 2013 for the completion of the commercial validation campaign for TPOXX®, the $20.5 million milestone payment (referenced above) in 2016 for submission of documentation to BARDA indicating that data covering the first 100 subjects enrolled in the phase III pivotal safety study had been submitted to and reviewed by a DSMB and that such DSMB had recommended continuation of the safety study, as well as submission of the final pivotal rabbit efficacy study report to the FDA, and $286.9 million of payments for physical deliveries of TPOXX® to the Strategic Stockpile beginning in 2013. As of June 30, 2017, the Company is eligible under the Base Contract to receive a $40.9 million hold back payment, which represents an approximate 10% hold back on the $409.8 million of total payments related to the manufacture and delivery of 1.7 million courses of TPOXX® under the Base Contract. The $40.9 million hold back payment would be triggered by FDA approval of TPOXX®, as long as the Company has cumulatively delivered 2.0 million courses of TPOXX® to the Strategic Stockpile and the Company does not have a continuing product replacement obligation to BARDA. With regard to future product deliveries after June 30, 2017, the Company expects to deliver approximately 338,000 courses of TPOXX® at no cost to BARDA in order to fulfill the delivery requirements of the BARDA Contract. Courses to be delivered are expected to be at a dosage of 600 mg administered twice per day (1,200 mg per day). The “no cost to BARDA” courses are primarily attributable to a change in TPOXX® dosage (see paragraph below). Courses delivered to the Strategic Stockpile are subject to a product replacement obligation. Starting in 2015, product deliveries of TPOXX® have been at a provisional dosage of 600 mg administered twice per day (1,200 mg per day). This was a change from the provisional dosage that was in effect when product deliveries were made in 2013 and 2014 (600 mg per day). In 2013 and 2014, the provisional dosage of courses delivered to the Strategic Stockpile was 600 mg administered once a day. The change in the provisional dosage was based on FDA guidance received by the Company in 2014, subsequent to the delivery of 1.3 million courses of TPOXX®. Based on the current provisional dosage of 600 mg administered twice per day (1,200 mg per day), the Company expects to supplement previously delivered courses of TPOXX®, at no cost to BARDA, with additional dosages so that all of the courses previously delivered to BARDA will be at the current provisional dosage. The Company and BARDA agreed to an amendment (the “BARDA Amendment”) of the BARDA Contract to reflect the foregoing. In February 2016, the FDA confirmed (through dose concurrence) its earlier dosage guidance of 600 mg administered twice per day (1,200 mg per day). The Company is incurring significant incremental costs with the production of additional dosage at no cost to BARDA. In addition to the Base Contract, the BARDA Contract also separately contains $122.7 million of remaining options that, if exercised by BARDA: would result in a $50.0 million payment to the Company in the event of FDA approval for extension to 84-month expiry for TPOXX® (from 38-month expiry as required in the Base Contract); would fund up to $58.3 million of development and supportive activities such as work on a smallpox prophylaxis indication for TPOXX®; and/or would fund $14.4 million of production-related activities related to warm-base manufacturing. In 2015, BARDA exercised two options related to extending the indication of the drug to the geriatric and pediatric populations. The stated value of these exercises was minimal. BARDA may choose not to exercise additional options in the future. Options are exercisable by BARDA at its sole discretion. BARDA has indicated that it will evaluate, after the FDA’s review and evaluation of stability data, the Company's request that BARDA exercise the option for the $50.0 million payment to the Company in the event of FDA approval of 84-month expiry for TPOXX®. The BARDA Contract expires in September 2020. The BARDA Contract is a multiple deliverable arrangement comprising delivery of courses and covered research and development activities. The BARDA Contract provides certain product replacement rights with respect to delivered courses. For this reason, recognition of revenue that might otherwise occur upon delivery of courses is expected to be deferred until the Company’s obligations related to potential replacement of delivered courses are satisfied. The Company assessed the selling price for each of the aforementioned deliverables - research and development activities and drug product. The selling price of certain reimbursed research and development services was determined by reference to existing and past research and development grants and contracts between the Company and various government agencies. The selling price of drug product was determined by reference to other companies’ sales of drug products such as antiviral therapeutics, orphan drugs and drugs with potential life-saving impact similar to TPOXX®, including products delivered to the Strategic Stockpile. The Company has recognized revenue for reimbursement of certain BARDA Contract research and development services. Cash inflows related to delivery of courses will continue to be recorded as deferred revenue. In addition, direct costs incurred by the Company to fulfill the delivery of courses including the supplementing of courses previously delivered under the BARDA Contract are being deferred and will be recognized as expenses over the same period that the related deferred revenue is recognized as revenue. As of June 30, 2017 and December 31, 2016, deferred direct costs under the BARDA Contract of approximately $83.2 million and $72.6 million, respectively, are included in deferred costs on the consolidated balance sheets. As of June 30, 2017, the Company recorded $376.5 million of deferred revenue. Deferred revenue has been recorded for the delivery of courses of TPOXX® to the Strategic Stockpile and certain supportive services provided as part of the BARDA Contract. For the three months and six months ended June 30, 2017, revenue from reimbursed research and development under the BARDA Contract was $3.0 million and $7.6 million, respectively. Research Agreements and Grants The Company obtains funding from the contracts and grants it obtains from various agencies of the U.S. Government to support its research and development activities. Currently, the Company has one contract with an expiration date of December 30, 2020 and one grant with an expiration date of April 30, 2018, which in combination provide for potential future aggregate research and development funding for specific projects of approximately $16.2 million. During the three months ended March 31, 2017, the contract was amended to increase the available funding for the R&D program related to the IV formulation of TPOXX® by approximately $10.1 million and to extend the end date of the period of performance from June 30, 2020 to December 30, 2020. The funded amount includes, among other things, options that may or may not be exercised at the U.S. Government’s discretion. Moreover, the contract and grant contain customary terms and conditions including the U.S. Government’s right to terminate or restructure a grant for convenience at any time. As such, we may not be able to utilize all available funds under the contract and/or grant.

3. Procurement Contract and Research Agreements

Procurement Contract

On May 13, 2011, the Company signed a contract with the U.S. Biomedical Advanced Research and Development Authority (“BARDA”) pursuant to which SIGA agreed to deliver two million courses of TPOXX® to the Strategic Stockpile. The contract with BARDA (as modified, the “BARDA Contract”) is worth approximately $472.3 million, including $409.8 million related to the manufacture and delivery of 1.7 million courses of TPOXX® and $62.5 million of potential reimbursements connected to development and supportive activities (the “Base Contract”).

Under the Base Contract, BARDA has agreed to buy from the Company 1.7 million courses of TPOXX®. Additionally, the Company expects to contribute to BARDA 300,000 courses at no additional cost to BARDA. A total of 2.0 million courses of TPOXX® is required to be delivered to the Strategic Stockpile in order for the Company to be eligible to receive the $40.9 million hold back payment (see description of hold back payment below).

For courses of TPOXX® that are physically delivered to the Strategic Stockpile, the Company has replacement obligations, at no cost to BARDA, in the event that the final version of TPOXX® approved by the FDA is different from any courses of TPOXX® that have been delivered to the Strategic Stockpile or if TPOXX® does not meet any specified label claims, fails release testing or does not meet the 38-month expiry period (from time of delivery to the Strategic Stockpile), or if TPOXX® is recalled or deemed to be recalled for any reason.

As of June 30, 2017, the Company has received $368.9 million under the Base Contract related to the manufacture and physical delivery of courses of TPOXX®. Included in this amount are a $41.0 million advance payment in 2011 for the completion of certain planning and preparatory activities related to the Base Contract, a $12.3 million milestone payment in 2012 for the completion of the product labeling strategy for TPOXX®, an $8.2 million milestone payment in 2013 for the completion of the commercial validation campaign for TPOXX®, the $20.5 million milestone payment (referenced above) in 2016 for submission of documentation to BARDA indicating that data covering the first 100 subjects enrolled in the phase III pivotal safety study had been submitted to and reviewed by a DSMB and that such DSMB had recommended continuation of the safety study, as well as submission of the final pivotal rabbit efficacy study report to the FDA, and $286.9 million of payments for physical deliveries of TPOXX® to the Strategic Stockpile beginning in 2013.

As of June 30, 2017, the Company is eligible under the Base Contract to receive a $40.9 million hold back payment, which represents an approximate 10% hold back on the $409.8 million of total payments related to the manufacture and delivery of 1.7 million courses of TPOXX® under the Base Contract. The $40.9 million hold back payment would be triggered by FDA approval of TPOXX®, as long as the Company has cumulatively delivered 2.0 million courses of TPOXX® to the Strategic Stockpile and the Company does not have a continuing product replacement obligation to BARDA.

With regard to future product deliveries after June 30, 2017, the Company expects to deliver approximately 338,000 courses of TPOXX® at no cost to BARDA in order to fulfill the delivery requirements of the BARDA Contract. Courses to be delivered are expected to be at a dosage of 600 mg administered twice per day (1,200 mg per day). The “no cost to BARDA” courses are primarily attributable to a change in TPOXX® dosage (see paragraph below). Courses delivered to the Strategic Stockpile are subject to a product replacement obligation.

Starting in 2015, product deliveries of TPOXX® have been at a provisional dosage of 600 mg administered twice per day (1,200 mg per day). This was a change from the provisional dosage that was in effect when product deliveries were made in 2013 and 2014 (600 mg per day). In 2013 and 2014, the provisional dosage of courses delivered to the Strategic Stockpile was 600 mg administered once a day. The change in the provisional dosage was based on FDA guidance received by the Company in 2014, subsequent to the delivery of 1.3 million courses of TPOXX®. Based on the current provisional dosage of 600 mg administered twice per day (1,200 mg per day), the Company expects to supplement previously delivered courses of TPOXX®, at no cost to BARDA, with additional dosages so that all of the courses previously delivered to BARDA will be at the current provisional dosage. The Company and BARDA agreed to an amendment (the “BARDA Amendment”) of the BARDA Contract to reflect the foregoing. In February 2016, the FDA confirmed (through dose concurrence) its earlier dosage guidance of 600 mg administered twice per day (1,200 mg per day).

The Company is incurring significant incremental costs with the production of additional dosage at no cost to BARDA.

In addition to the Base Contract, the BARDA Contract also separately contains $122.7 million of remaining options that, if exercised by BARDA: would result in a $50.0 million payment to the Company in the event of FDA approval for extension to 84-month expiry for TPOXX® (from 38-month expiry as required in the Base Contract); would fund up to $58.3 million of development and supportive activities such as work on a smallpox prophylaxis indication for TPOXX®; and/or would fund $14.4 million of production-related activities related to warm-base manufacturing. In 2015, BARDA exercised two options related to extending the indication of the drug to the geriatric and pediatric populations. The stated value of these exercises was minimal. BARDA may choose not to exercise additional options in the future. Options are exercisable by BARDA at its sole discretion. BARDA has indicated that it will evaluate, after the FDA’s review and evaluation of stability data, the Company's request that BARDA exercise the option for the $50.0 million payment to the Company in the event of FDA approval of 84-month expiry for TPOXX®.

The BARDA Contract expires in September 2020.

The BARDA Contract is a multiple deliverable arrangement comprising delivery of courses and covered research and development activities. The BARDA Contract provides certain product replacement rights with respect to delivered courses. For this reason, recognition of revenue that might otherwise occur upon delivery of courses is expected to be deferred until the Company’s obligations related to potential replacement of delivered courses are satisfied. The Company assessed the selling price for each of the aforementioned deliverables - research and development activities and drug product. The selling price of certain reimbursed research and development services was determined by reference to existing and past research and development grants and contracts between the Company and various government agencies. The selling price of drug product was determined by reference to other companies’ sales of drug products such as antiviral therapeutics, orphan drugs and drugs with potential life-saving impact similar to TPOXX®, including products delivered to the Strategic Stockpile.

The Company has recognized revenue for reimbursement of certain BARDA Contract research and development services. Cash inflows related to delivery of courses will continue to be recorded as deferred revenue. In addition, direct costs incurred by the Company to fulfill the delivery of courses including the supplementing of courses previously delivered under the BARDA Contract are being deferred and will be recognized as expenses over the same period that the related deferred revenue is recognized as revenue.

As of June 30, 2017 and December 31, 2016, deferred direct costs under the BARDA Contract of approximately $83.2 million and $72.6 million, respectively, are included in deferred costs on the consolidated balance sheets. As of June 30, 2017, the Company recorded $376.5 million of deferred revenue. Deferred revenue has been recorded for the delivery of courses of TPOXX® to the Strategic Stockpile and certain supportive services provided as part of the BARDA Contract. For the three months and six months ended June 30, 2017, revenue from reimbursed research and development under the BARDA Contract was $3.0 million and $7.6 million, respectively.

Research Agreements and Grants

The Company obtains funding from the contracts and grants it obtains from various agencies of the U.S. Government to support its research and development activities. Currently, the Company has one contract with an expiration date of December 30, 2020 and one grant with an expiration date of April 30, 2018, which in combination provide for potential future aggregate research and development funding for specific projects of approximately $16.2 million. During the three months ended March 31, 2017, the contract was amended to increase the available funding for the R&D program related to the IV formulation of TPOXX® by approximately $10.1 million and to extend the end date of the period of performance from June 30, 2020 to December 30, 2020.

The funded amount includes, among other things, options that may or may not be exercised at the U.S. Government’s discretion. Moreover, the contract and grant contain customary terms and conditions including the U.S. Government’s right to terminate or restructure a grant for convenience at any time. As such, we may not be able to utilize all available funds under the contract and/or grant.