Note 11 - Grants and Collaboration Revenue

3 Months Ended

Mar. 31, 2020

Notes to Financial Statements

Government Grants and Contracts [Text Block]

11.

     Grants and Collaboration Revenue

We receive payments from government entities under grants from the National Institute of Allergy and Infectious Diseases (NIAID) and from the U.S. Department of Defense in support of our vaccine research and development efforts. We record revenue associated with government grants as the reimbursable costs are incurred. During the

three

-month periods ended

March 31, 2020

and

2019,

we recorded

$654,021

and

$354,319,

respectively, of revenues associated with these grants. As of

March 31, 2020,

there is an aggregate of

$606,944

in approved grant funds available for use during

2020.

During the

three

-month periods ended

March 31, 2020

and

2019,

we recorded

$61,956

and

$9,913,

respectively, of revenues associated with research collaboration agreements with several

third

parties.