Note 3 - Procurement Contracts and Research Agreements	6 Months Ended
Jun. 30, 2020
Notes to Financial Statements
Procurement Contract and Research Agreements [Text Block]	3. Procurement Contracts and Research Agreements 19C BARDA Contract On September 10, 2018, the Company entered into a contract with the U.S. Biomedical Advanced Research and Development Authority ("BARDA") pursuant to which SIGA agreed to deliver up to 1,488,000 courses of oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile"), and to manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of the intravenous (IV) formulation of TPOXX® ("IV TPOXX®"). Additionally, the contract includes funding from BARDA for advanced development of IV TPOXX®, post-marketing activities for oral and IV TPOXX®, and procurement activities. As of June 30, 2020, the contract with BARDA (as amended, modified, or supplemented from time to time, the "19C BARDA Contract") contemplates up to approximately $602.5 million of payments, of which approximately $51.7 million of payments are included within the base period of performance of five years, approximately $127.1 million of payments are related to exercised options and up to approximately $423.7 million of payments are currently specified as unexercised options. BARDA may choose in its sole discretion when, or whether, to exercise any of the unexercised options. The period of performance for options is up to ten years from the date of entry into the 19C BARDA Contract and such options could be exercised at any time during the contract term, including during the base period of performance. On May 20, 2019, an option for the manufacture and delivery of 363,070 courses of oral TPOXX® was modified to divide it into four procurement-related options. One of the four modified procurement-related options provides for the payment of $11.2 million for the procurement of raw materials to be used in the manufacture of at least 363,070 courses of oral TPOXX®. This option was exercised simultaneously with the aforementioned modification. Each of the other three options individually specifies the delivery of approximately 121,000 courses of oral TPOXX® for consideration of approximately $33.8 million. These options were exercised on April 29, 2020. In total, the four options under the May 2019 modification provide for the purchase of raw material for and the manufacture and delivery of 363,070 courses of oral TPOXX® for consideration of approximately $112.5 million. The option modification did not change the overall total potential value of the 19C BARDA Contract, nor did it change the total amount to be paid in connection with the manufacture and delivery of oral TPOXX® courses. The base period of performance specifies potential payments of approximately $51.7 million for the following activities: payments of approximately $11.1 million for the delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile; payments of $8.0 million for the manufacture of 20,000 courses of final drug product of IV TPOXX® ("IV FDP"), of which $3.2 million of payments are related to the manufacture of bulk drug substance ("IV BDS") to be used in the manufacture of IV FDP; payments of approximately $32.0 million to fund advanced development of IV TPOXX®; and payments of approximately $0.6 million for supportive procurement activities. As of June 30, 2020, the Company had received $11.1 million for the successful delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of IV BDS and $4.7 million for other base period activities. IV BDS is expected to be used for the manufacture of 20,000 courses of IV FDP. The $3.2 million received for the manufacture of IV BDS has been recorded as deferred revenue as of June 30, 2020 and December 31, 2019; such amount is expected to be recognized as revenue when IV TPOXX® containing such IV BDS is delivered to the Strategic Stockpile or placed in vendor-managed inventory. The options that have been exercised to date provide for payments up to approximately $127.1 million. There are exercised options for the following activities: payments up to $11.2 million for the procurement of raw materials to be used in the manufacture of at least 363,070 courses of oral TPOXX®, payments up to $101.3 million for the delivery of up to 363,070 courses of oral TPOXX®; and, payments of up to $14.6 million for funding of post-marketing activities for oral TPOXX®. As of June 30, the Company has received the following payments in connection with exercised options: $11.2 million was received for the procurement of raw materials and such amount was initially recorded as deferred revenue, with $3.6 million of this amount being recognized as revenue due to the June delivery of approximately 117,000 courses of oral TPOXX® (the remaining $7.6 million of deferred revenue is expected to be recognized as revenue when additional courses of oral TPOXX®, containing raw materials for which the Company has been paid, are delivered to the Strategic Stockpile or placed in vendor-managed inventory); and $2.3 million has been received in connection with post-marketing activities for oral TPOXX®. In July, the Company received a $32.6 million payment for the June delivery of approximately 117,000 courses of oral TPOXX®; in the second quarter, 2020, $36.2 million of revenue was recognized in connection with this product delivery, of which $32.6 million relates to the amount invoiced for product delivery and acceptance, and $3.6 million relates to amounts that were previously received and recorded as deferred revenue. Unexercised options specify potential payments up to approximately $423.7 million in total (if all such options are exercised). There are options for the following activities: payments of up to $337.7 million for the delivery of up to approximately 1,089,000 courses of oral TPOXX® to the Strategic Stockpile; payments of up to $76.8 million for the manufacture of up to 192,000 courses of IV FDP, of which up to $30.7 million of payments would be paid upon the manufacture of IV BDS to be used in the manufacture of IV FDP; payments of up to approximately $3.6 million to fund post-marketing activities for IV TPOXX®; and payments of up to approximately $5.6 million for supportive procurement activities. The options related to IV TPOXX® are divided into two primary manufacturing steps. There are options related to the manufacture of bulk drug substance (“IV BDS Options”), and there are corresponding options (for the same number of IV courses) for the manufacture of final drug product (“IV FDP Options”). BARDA may choose to exercise any, all, or none of these options in its sole discretion. The 19C BARDA Contract includes: three separate IV BDS Options, each providing for the bulk drug substance equivalent of 64,000 courses of IV TPOXX®; and three separate IV FDP Options, each providing for 64,000 courses of final drug product of IV TPOXX®. BARDA has the sole discretion as to whether to simultaneously exercise IV BDS Options and IV FDP Options, or whether to make independent exercise decisions. If BARDA decides to only exercise IV BDS Options, then the Company would receive payments up to $30.7 million; alternatively, if BARDA decides to exercise both IV BDS Options and IV FDP Options, then the Company would receive payments up to $76.8 million. For each set of options relating to a specific group of courses (for instance, the IV BDS and IV FDP options that reference the same 64,000 courses), BARDA has the option to independently purchase IV BDS or IV FDP. Revenues in connection with the 19C BARDA Contract are recognized either over time or at a point in time. Performance obligations related to product delivery generate revenue at a point in time. Revenue for other performance obligations under the 19C BARDA Contract are recognized over time using an input method using costs incurred to date relative to total estimated costs at completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenues of $1.4 million and $0.4 million, respectively, on an over time basis. For the six months ended June 30, 2020 and 2019, the Company recognized revenues of $3.5 million and $1.7 million, respectively, on an over time basis. In contrast, revenue recognized for product delivery and therefore at a point in time for the three and six months ended June 30, 2020 was $36.2 million. For the six months ended June 30, 2019, the Company recognized $7.1 million of revenue at a point in time. 2011 BARDA Contract On May 13, 2011, the Company signed a contract with BARDA pursuant to which BARDA agreed to buy from the Company 1.7 million courses of oral TPOXX®. Additionally, the Company agreed to contribute to BARDA 300,000 courses at no additional cost to BARDA. The contract with BARDA (as amended, modified, or supplemented from time to time the "2011 BARDA Contract") includes a base contract, as modified, ("2011 Base Contract") as well as options. The 2011 Base Contract specifies approximately $508.4 million of payments (including exercised options), of which, as of June 30, 2020, $459.8 million has been received by the Company for the manufacture and delivery of 1.7 million courses of oral TPOXX® and $45.4 million has been received for certain reimbursements in connection with development and supportive activities. Approximately $3.2 million remains eligible to be received in the future for reimbursements of development and supportive activities. For courses of oral TPOXX® that have been physically delivered to the Strategic Stockpile under the 2011 BARDA Contract, there are product replacement obligations, including: (i) a product replacement obligation in the event that the final version of oral TPOXX® approved by the FDA was different from any courses of oral TPOXX® that had been delivered to the Strategic Stockpile (the “FDA Approval Replacement Obligation”); (ii) a product replacement obligation, at no cost to BARDA, in the event that oral TPOXX® is recalled or deemed to be recalled for any reason; and (iii) a product replacement obligation in the event that oral TPOXX® does not meet any specified label claims. On July 13, 2018, the FDA approved oral TPOXX® for the treatment of smallpox and there is no difference between the approved product and courses in the Strategic Stockpile. As such, the possibility of the FDA Approval Replacement Obligation resulting in any future replacements of product within the Strategic Stockpile is remote. The 2011 BARDA Contract includes options. On July 30, 2018, the 2011 BARDA Contract was modified and BARDA exercised its option relating to FDA approval of the aforementioned 84-month expiry for oral TPOXX® for which the Company was paid $50.0 million in August 2018. With the option exercise, the 2011 BARDA Contract was modified so that the 2011 Base Contract increased by $50.0 million. Remaining options, if all were exercised by BARDA, would result in aggregate payments to the Company of $72.7 million, including up to $58.3 million of funding for development and supportive activities such as work on a post-exposure prophylaxis ("PEP") indication for TPOXX® and/or $14.4 million of funding for production-related activities related to warm base manufacturing. BARDA may choose, in its sole discretion not to exercise any or all of the unexercised options. In 2015, BARDA exercised two options related to extending the indication of the drug to the geriatric and pediatric populations. The stated value of those exercises was immaterial. The 2011 BARDA Contract expires in September 2020. Revenues in connection with the 2011 BARDA Contract are recognized either over time or at a point in time. Performance obligations related to product delivery generate revenue at a point in time. Remaining performance obligations under the 2011 BARDA Contract generate revenue over time, using an input method of costs incurred to date relative to the total estimated costs at completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenue of approximately $0.1 million and $0.1 million, respectively, on an over time basis. For the six months ended June 30, 2020 and 2019, the Company recognized revenue of $0.1 million and $0.2 million, respectively on an over time basis. In contrast, there was no revenue recognized for product delivery and therefore at a point in time for the three and six months ended June 30, 2020 or 2019. International Procurement Contracts On April 3, 2020, the Company announced that the Canadian Department of National Defence (the “CDND”) awarded a contract (the "Canadian Contract") to Meridian Medical Technologies, Inc., a Pfizer Company ("Meridian"), pursuant to which the CDND will purchase up to 15,325 courses of oral TPOXX® over four years for total potential payments of $14.3 million. In the second quarter 2020, CDND purchased 2,500 courses for $2.3 million. The remaining purchases are at the option of the CDND, and are expected to occur after regulatory approval of oral TPOXX® in Canada. Meridian is the CDND's counterparty under the Canadian Contract, and SIGA is responsible for manufacture and delivery of any oral TPOXX® purchased thereunder. The contract award was coordinated between SIGA and Meridian under the international promotion agreement (the "International Promotion Agreement") that was entered into by the parties on June 3, 2019. Under the terms of the International Promotion Agreement, Meridian was granted exclusive rights to market, advertise, promote, offer for sale, or sell oral TPOXX® in a field of use specified in the International Promotion Agreement in all geographic regions except for the United States and South Korea (the “Territory”), and Meridian has agreed not to commercialize any competing product, as defined in the International Promotion Agreement, in the specified field of use in the Territory. SIGA will retain ownership, intellectual property, distribution and supply rights and regulatory responsibilities in connection with TPOXX®, and, in the United States and South Korean markets, will also retain sales and marketing rights with respect to oral TPOXX®. SIGA’s consent shall be required for the entry into any sales arrangement pursuant to the International Promotion Agreement. The fee Meridian retains pursuant to the International Promotion Agreement will be a specified percentage of the collected proceeds of sales of oral TPOXX® net of certain expenses, for years in which customer invoiced amounts net of such expenses are less than or equal to a specified threshold, and a higher specified percentage of such collected net proceeds for years in which such net invoiced amounts exceed the specified threshold. Revenue in connection with international procurement contracts for the delivery of product are recognized at a point in time. During the three and six months ended June 30, 2020, the Company recognized $2.3 million of revenue. *Research Agreements and Grants* The Company has an R&D program for IV TPOXX®. This program is funded by the 19C BARDA Contract and a development contract with BARDA (“IV Formulation R&D Contract”). The IV Formulation R&D Contract has a period of performance that terminates in February 2024. As of June 30, 2020, the IV Formulation R&D Contract provides for future aggregate research and development funding of approximately $2.2 million. Revenues in connection with the IV Formulation R&D Contract are recognized over time, under an input method using costs incurred to date relative to the total estimated costs of completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenue of $0.3 million and $3.4 million, respectively. For the six months ended June 30, 2020 and 2019, the Company recognized revenue of $0.7 million and $5.3 million, respectively, under this contract. During the three months ended June 30, 2019, the Company completed its negotiation with representatives of the U.S. government for a change in the application of certain reimbursement rates in the contract. The change in the application of those reimbursement rates increased the overall transaction price of the IV Formulation R&D Contract but did not change the estimate of costs to complete under the input method calculation. As a result, the Company accounted for this as a change in the transaction price and recognized a cumulative catch-up adjustment to revenue of approximately $3.3 million representing the impact of the change in the application of those reimbursement rates from January 2016 through March 2019. In July 2019, the Company was awarded a multi-year research contract valued at a total of $19.5 million, with initial available funding of $12.4 million, from the United States Department of Defense ("DoD") to support work in pursuit of a potential label expansion for oral TPOXX® that would include post-exposure prophylaxis ("PEP") of smallpox (such work known as the "PEP Label Expansion Program" and the contract referred to as the "PEP Label Expansion R&D Contract"). In May 2020, the DoD increased the scope and the contract value to a total of $26 million with current available funding of $23 million. As of June 30, 2020, the PEP Label Expansion R&D Contract provides for future aggregate research and development funding under the initial award of up to approximately $22.6 million. The period of performance for this contract, as modified, terminates on July 31, 2025. For the three and six months ended June 30, 2020, the Company, under the PEP Label Expansion R&D Contract, recognized revenue of less than $0.1 million on an over time basis. Contracts and grants include, among other things, options that may or may not be exercised at the U.S. Government’s discretion. Moreover, contracts and grants contain customary terms and conditions including the U.S. Government’s right to terminate or restructure a contract or grant for convenience at any time. As such, we may not be eligible to receive all available funds.

Note 3 - Procurement Contracts and Research Agreements

6 Months Ended

Jun. 30, 2020

Procurement Contract and Research Agreements [Text Block]

3. Procurement Contracts and Research Agreements

19C BARDA Contract

On September 10, 2018, the Company entered into a contract with the U.S. Biomedical Advanced Research and Development Authority ("BARDA") pursuant to which SIGA agreed to deliver up to 1,488,000 courses of oral TPOXX® to the U.S. Strategic National Stockpile ("Strategic Stockpile"), and to manufacture and deliver to the Strategic Stockpile, or store as vendor-managed inventory, up to 212,000 courses of the intravenous (IV) formulation of TPOXX® ("IV TPOXX®"). Additionally, the contract includes funding from BARDA for advanced development of IV TPOXX®, post-marketing activities for oral and IV TPOXX®, and procurement activities. As of June 30, 2020, the contract with BARDA (as amended, modified, or supplemented from time to time, the "19C BARDA Contract") contemplates up to approximately $602.5 million of payments, of which approximately $51.7 million of payments are included within the base period of performance of five years, approximately $127.1 million of payments are related to exercised options and up to approximately $423.7 million of payments are currently specified as unexercised options. BARDA may choose in its sole discretion when, or whether, to exercise any of the unexercised options. The period of performance for options is up to ten years from the date of entry into the 19C BARDA Contract and such options could be exercised at any time during the contract term, including during the base period of performance. On May 20, 2019, an option for the manufacture and delivery of 363,070 courses of oral TPOXX® was modified to divide it into four procurement-related options. One of the four modified procurement-related options provides for the payment of $11.2 million for the procurement of raw materials to be used in the manufacture of at least 363,070 courses of oral TPOXX®. This option was exercised simultaneously with the aforementioned modification. Each of the other three options individually specifies the delivery of approximately 121,000 courses of oral TPOXX® for consideration of approximately $33.8 million. These options were exercised on April 29, 2020. In total, the four options under the May 2019 modification provide for the purchase of raw material for and the manufacture and delivery of 363,070 courses of oral TPOXX® for consideration of approximately $112.5 million. The option modification did not change the overall total potential value of the 19C BARDA Contract, nor did it change the total amount to be paid in connection with the manufacture and delivery of oral TPOXX® courses.

The base period of performance specifies potential payments of approximately $51.7 million for the following activities: payments of approximately $11.1 million for the delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile; payments of $8.0 million for the manufacture of 20,000 courses of final drug product of IV TPOXX® ("IV FDP"), of which $3.2 million of payments are related to the manufacture of bulk drug substance ("IV BDS") to be used in the manufacture of IV FDP; payments of approximately $32.0 million to fund advanced development of IV TPOXX®; and payments of approximately $0.6 million for supportive procurement activities. As of June 30, 2020, the Company had received $11.1 million for the successful delivery of approximately 35,700 courses of oral TPOXX® to the Strategic Stockpile, $3.2 million for the manufacture of IV BDS and $4.7 million for other base period activities. IV BDS is expected to be used for the manufacture of 20,000 courses of IV FDP. The $3.2 million received for the manufacture of IV BDS has been recorded as deferred revenue as of June 30, 2020 and December 31, 2019; such amount is expected to be recognized as revenue when IV TPOXX® containing such IV BDS is delivered to the Strategic Stockpile or placed in vendor-managed inventory.

The options that have been exercised to date provide for payments up to approximately $127.1 million. There are exercised options for the following activities: payments up to $11.2 million for the procurement of raw materials to be used in the manufacture of at least 363,070 courses of oral TPOXX®, payments up to $101.3 million for the delivery of up to 363,070 courses of oral TPOXX®; and, payments of up to $14.6 million for funding of post-marketing activities for oral TPOXX®. As of June 30, the Company has received the following payments in connection with exercised options: $11.2 million was received for the procurement of raw materials and such amount was initially recorded as deferred revenue, with $3.6 million of this amount being recognized as revenue due to the June delivery of approximately 117,000 courses of oral TPOXX® (the remaining $7.6 million of deferred revenue is expected to be recognized as revenue when additional courses of oral TPOXX®, containing raw materials for which the Company has been paid, are delivered to the Strategic Stockpile or placed in vendor-managed inventory); and $2.3 million has been received in connection with post-marketing activities for oral TPOXX®. In July, the Company received a $32.6 million payment for the June delivery of approximately 117,000 courses of oral TPOXX®; in the second quarter, 2020, $36.2 million of revenue was recognized in connection with this product delivery, of which $32.6 million relates to the amount invoiced for product delivery and acceptance, and $3.6 million relates to amounts that were previously received and recorded as deferred revenue.

Unexercised options specify potential payments up to approximately $423.7 million in total (if all such options are exercised). There are options for the following activities: payments of up to $337.7 million for the delivery of up to approximately 1,089,000 courses of oral TPOXX® to the Strategic Stockpile; payments of up to $76.8 million for the manufacture of up to 192,000 courses of IV FDP, of which up to $30.7 million of payments would be paid upon the manufacture of IV BDS to be used in the manufacture of IV FDP; payments of up to approximately $3.6 million to fund post-marketing activities for IV TPOXX®; and payments of up to approximately $5.6 million for supportive procurement activities.

The options related to IV TPOXX® are divided into two primary manufacturing steps. There are options related to the manufacture of bulk drug substance (“IV BDS Options”), and there are corresponding options (for the same number of IV courses) for the manufacture of final drug product (“IV FDP Options”). BARDA may choose to exercise any, all, or none of these options in its sole discretion. The 19C BARDA Contract includes: three separate IV BDS Options, each providing for the bulk drug substance equivalent of 64,000 courses of IV TPOXX®; and three separate IV FDP Options, each providing for 64,000 courses of final drug product of IV TPOXX®. BARDA has the sole discretion as to whether to simultaneously exercise IV BDS Options and IV FDP Options, or whether to make independent exercise decisions. If BARDA decides to only exercise IV BDS Options, then the Company would receive payments up to $30.7 million; alternatively, if BARDA decides to exercise both IV BDS Options and IV FDP Options, then the Company would receive payments up to $76.8 million. For each set of options relating to a specific group of courses (for instance, the IV BDS and IV FDP options that reference the same 64,000 courses), BARDA has the option to independently purchase IV BDS or IV FDP.

Revenues in connection with the 19C BARDA Contract are recognized either over time or at a point in time. Performance obligations related to product delivery generate revenue at a point in time. Revenue for other performance obligations under the 19C BARDA Contract are recognized over time using an input method using costs incurred to date relative to total estimated costs at completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenues of $1.4 million and $0.4 million, respectively, on an over time basis. For the six months ended June 30, 2020 and 2019, the Company recognized revenues of $3.5 million and $1.7 million, respectively, on an over time basis. In contrast, revenue recognized for product delivery and therefore at a point in time for the three and six months ended June 30, 2020 was $36.2 million. For the six months ended June 30, 2019, the Company recognized $7.1 million of revenue at a point in time.

2011 BARDA Contract

On May 13, 2011, the Company signed a contract with BARDA pursuant to which BARDA agreed to buy from the Company 1.7 million courses of oral TPOXX®. Additionally, the Company agreed to contribute to BARDA 300,000 courses at no additional cost to BARDA.

The contract with BARDA (as amended, modified, or supplemented from time to time the "2011 BARDA Contract") includes a base contract, as modified, ("2011 Base Contract") as well as options. The 2011 Base Contract specifies approximately $508.4 million of payments (including exercised options), of which, as of June 30, 2020, $459.8 million has been received by the Company for the manufacture and delivery of 1.7 million courses of oral TPOXX® and $45.4 million has been received for certain reimbursements in connection with development and supportive activities. Approximately $3.2 million remains eligible to be received in the future for reimbursements of development and supportive activities.

For courses of oral TPOXX® that have been physically delivered to the Strategic Stockpile under the 2011 BARDA Contract, there are product replacement obligations, including: (i) a product replacement obligation in the event that the final version of oral TPOXX® approved by the FDA was different from any courses of oral TPOXX® that had been delivered to the Strategic Stockpile (the “FDA Approval Replacement Obligation”); (ii) a product replacement obligation, at no cost to BARDA, in the event that oral TPOXX® is recalled or deemed to be recalled for any reason; and (iii) a product replacement obligation in the event that oral TPOXX® does not meet any specified label claims. On July 13, 2018, the FDA approved oral TPOXX® for the treatment of smallpox and there is no difference between the approved product and courses in the Strategic Stockpile. As such, the possibility of the FDA Approval Replacement Obligation resulting in any future replacements of product within the Strategic Stockpile is remote.

The 2011 BARDA Contract includes options. On July 30, 2018, the 2011 BARDA Contract was modified and BARDA exercised its option relating to FDA approval of the aforementioned 84-month expiry for oral TPOXX® for which the Company was paid $50.0 million in August 2018. With the option exercise, the 2011 BARDA Contract was modified so that the 2011 Base Contract increased by $50.0 million. Remaining options, if all were exercised by BARDA, would result in aggregate payments to the Company of $72.7 million, including up to $58.3 million of funding for development and supportive activities such as work on a post-exposure prophylaxis ("PEP") indication for TPOXX® and/or $14.4 million of funding for production-related activities related to warm base manufacturing. BARDA may choose, in its sole discretion not to exercise any or all of the unexercised options. In 2015, BARDA exercised two options related to extending the indication of the drug to the geriatric and pediatric populations. The stated value of those exercises was immaterial.

The 2011 BARDA Contract expires in September 2020.

Revenues in connection with the 2011 BARDA Contract are recognized either over time or at a point in time. Performance obligations related to product delivery generate revenue at a point in time. Remaining performance obligations under the 2011 BARDA Contract generate revenue over time, using an input method of costs incurred to date relative to the total estimated costs at completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenue of approximately $0.1 million and $0.1 million, respectively, on an over time basis. For the six months ended June 30, 2020 and 2019, the Company recognized revenue of $0.1 million and $0.2 million, respectively on an over time basis. In contrast, there was no revenue recognized for product delivery and therefore at a point in time for the three and six months ended June 30, 2020 or 2019.

International Procurement Contracts

On April 3, 2020, the Company announced that the Canadian Department of National Defence (the “CDND”) awarded a contract (the "Canadian Contract") to Meridian Medical Technologies, Inc., a Pfizer Company ("Meridian"), pursuant to which the CDND will purchase up to 15,325 courses of oral TPOXX® over four years for total potential payments of $14.3 million. In the second quarter 2020, CDND purchased 2,500 courses for $2.3 million. The remaining purchases are at the option of the CDND, and are expected to occur after regulatory approval of oral TPOXX® in Canada. Meridian is the CDND's counterparty under the Canadian Contract, and SIGA is responsible for manufacture and delivery of any oral TPOXX® purchased thereunder. The contract award was coordinated between SIGA and Meridian under the international promotion agreement (the "International Promotion Agreement") that was entered into by the parties on June 3, 2019.

Under the terms of the International Promotion Agreement, Meridian was granted exclusive rights to market, advertise, promote, offer for sale, or sell oral TPOXX® in a field of use specified in the International Promotion Agreement in all geographic regions except for the United States and South Korea (the “Territory”), and Meridian has agreed not to commercialize any competing product, as defined in the International Promotion Agreement, in the specified field of use in the Territory. SIGA will retain ownership, intellectual property, distribution and supply rights and regulatory responsibilities in connection with TPOXX®, and, in the United States and South Korean markets, will also retain sales and marketing rights with respect to oral TPOXX®. SIGA’s consent shall be required for the entry into any sales arrangement pursuant to the International Promotion Agreement.

The fee Meridian retains pursuant to the International Promotion Agreement will be a specified percentage of the collected proceeds of sales of oral TPOXX® net of certain expenses, for years in which customer invoiced amounts net of such expenses are less than or equal to a specified threshold, and a higher specified percentage of such collected net proceeds for years in which such net invoiced amounts exceed the specified threshold.

Revenue in connection with international procurement contracts for the delivery of product are recognized at a point in time. During the three and six months ended June 30, 2020, the Company recognized $2.3 million of revenue.

Research Agreements and Grants

The Company has an R&D program for IV TPOXX®. This program is funded by the 19C BARDA Contract and a development contract with BARDA (“IV Formulation R&D Contract”). The IV Formulation R&D Contract has a period of performance that terminates in February 2024. As of June 30, 2020, the IV Formulation R&D Contract provides for future aggregate research and development funding of approximately $2.2 million.

Revenues in connection with the IV Formulation R&D Contract are recognized over time, under an input method using costs incurred to date relative to the total estimated costs of completion. For the three months ended June 30, 2020 and 2019, the Company recognized revenue of $0.3 million and $3.4 million, respectively. For the six months ended June 30, 2020 and 2019, the Company recognized revenue of $0.7 million and $5.3 million, respectively, under this contract. During the three months ended June 30, 2019, the Company completed its negotiation with representatives of the U.S. government for a change in the application of certain reimbursement rates in the contract. The change in the application of those reimbursement rates increased the overall transaction price of the IV Formulation R&D Contract but did not change the estimate of costs to complete under the input method calculation. As a result, the Company accounted for this as a change in the transaction price and recognized a cumulative catch-up adjustment to revenue of approximately $3.3 million representing the impact of the change in the application of those reimbursement rates from January 2016 through March 2019.

In July 2019, the Company was awarded a multi-year research contract valued at a total of $19.5 million, with initial available funding of $12.4 million, from the United States Department of Defense ("DoD") to support work in pursuit of a potential label expansion for oral TPOXX® that would include post-exposure prophylaxis ("PEP") of smallpox (such work known as the "PEP Label Expansion Program" and the contract referred to as the "PEP Label Expansion R&D Contract"). In May 2020, the DoD increased the scope and the contract value to a total of $26 million with current available funding of $23 million. As of June 30, 2020, the PEP Label Expansion R&D Contract provides for future aggregate research and development funding under the initial award of up to approximately $22.6 million. The period of performance for this contract, as modified, terminates on July 31, 2025. For the three and six months ended June 30, 2020, the Company, under the PEP Label Expansion R&D Contract, recognized revenue of less than $0.1 million on an over time basis.

Contracts and grants include, among other things, options that may or may not be exercised at the U.S. Government’s discretion. Moreover, contracts and grants contain customary terms and conditions including the U.S. Government’s right to terminate or restructure a contract or grant for convenience at any time. As such, we may not be eligible to receive all available funds.