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Note 8 - Commitments | 9 Months Ended | 12 Months Ended
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Sep. 30, 2021 | Dec. 31, 2020
Notes to Financial Statements |  |
Commitments Disclosure [Text Block] | 8. Commitments Lease Agreement We lease approximately 8,400 square feet of office and laboratory space pursuant to an operating lease which expires on December 31, 2022. Rent expense for the three-month and nine-month periods ended September 30, 2021 was $42,803 and $128,410, respectively, as compared to $41,539 and $124,617, respectively, for the same periods of 2020. Future minimum lease payments total $42,803 for the remainder of 2021 and $176,356 in 2022, although the lease may be terminated at any time by either party with ninety days’ written notice. Other Commitments In the normal course of business, we enter into various firm purchase commitments related to production and testing of our vaccine, conduct of research studies, and other activities. As of September 30, 2021, there are approximately $607,000 of unrecorded outstanding purchase commitments to our vendors and subcontractors, all of which we expect will be due in 2021. | 7. Commitments Lease Agreement We lease approximately 8,400 square feet of office and laboratory space pursuant to an operating lease which expires on December 31, 2022. Rent expense for the years ended December 31, 2020 and 2019 was $166,577 and $161,673, respectively. Future minimum lease payments total $171,213 in 2021 and $176,356 in 2022, although the lease may be terminated at any time by either party with ninety days written notice. Other Commitments In the normal course of business, we enter into various firm purchase commitments related to production and testing of our vaccine, conduct of research studies, and other activities. As of December 31, 2020, we had approximately $190,000 of unrecorded outstanding purchase commitments to our vendors and subcontractors, all of which we expect will be due in 2021. We expect $165,500 of this amount to be reimbursable to us pursuant to currently outstanding government grants.

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- Definition The entire disclosure for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Descriptions may include identification of the specific goods and services, period of time covered, minimum quantities and amounts, and cancellation rights. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -URI http://asc.fasb.org/topic&trid=2144648 + Details
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