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Note 11 - Grants and Collaboration Revenue
3 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Government Grants and Contracts [Text Block]
11.
     Grants and Collaboration Revenue
 
We receive payments from government entities under our 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, 2019
and
2018,
we recorded
$354,319
and
$216,299,
respectively, of revenues associated with these grants. As of
March 31, 2019,
there is an aggregate of
$2,525,419
in approved grant funds available for use during
2019
and
2020.
 
During the
three
-month periods ended
March 31, 2019
and
2018,
we recorded
$9,913
and
$5,000,
respectively, of revenues associated with research collaboration agreements with several
third
parties.