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Collaborative Agreements (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 29, 2017 | Aug. 07, 2015 product | Jun. 30, 2020 USD ($) | Apr. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jan. 31, 2020 USD ($) | Aug. 30, 2019 USD ($) | Oct. 31, 2018 USD ($) | Mar. 31, 2018 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | $ 236,178 | $ 866,863 |  | $ 1,830,639 | $ 3,832,442 |
Grant funding liability |  |  |  |  |  |  |  |  |  |  |  | 8,616,622 |  |  | 8,616,622 |  | $ 6,065,212
ApolloBio | Collaborative Arrangement, Product |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Territory expansion option period |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds received in upfront payment |  |  |  |  |  |  |  |  |  | $ 19,400,000 |  |  |  |  |  |  |
Upfront payment received |  |  |  |  |  |  |  |  |  | 23,000,000.0 |  |  |  | $ 23,000,000.0 | 23,000,000.0 |  |
Advisory fees |  |  |  |  |  |  |  |  |  | 960,000 |  |  |  |  |  |  |
Additional revenue to be achieved |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000,000.0 |  |
Royalty period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |
Period from effective date for termination |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |
Number of days written notice before termination |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |
ApolloBio | Collaborative Arrangement, Product | Foreign Tax Authority |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign corporate income taxes reducing upfront payment |  |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |
Foreign non-corporate income taxes reducing upfront payment |  |  |  |  |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |
AstraZeneca |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 21,000 | 255,000 |  | $ 167,000 | 3,000,000.0 |
AstraZeneca | Collaborative Arrangement, Product |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Upfront payment received | $ 27,500,000 |  |  |  |  |  |  |  |  |  | $ 27,500,000 |  |  |  |  |  |
Anticipated development and regulatory event based payment receivable milestones |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,000,000 |  |
Anticipated commercial event based payment receivable milestones |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 115,000,000 |  |
Number of additional products to be developed | product |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, funding to be received |  |  |  |  | $ 6,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | Lassa Fever And MERS Vaccine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, funding to be received |  |  |  |  | $ 56,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, period to receive funding for research and development |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Grant funding liability |  |  |  |  |  |  |  |  |  |  |  | 3,700,000 |  |  | 3,700,000 |  |
Funding received for research and development |  |  |  |  |  |  |  |  |  |  |  | 1,600,000 | 1,500,000 |  | 4,600,000 | 4,600,000 |
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | SARS-CoV-2/COVID-19 Vaccine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, funding to be received |  |  |  |  |  |  | $ 9,000,000.0 |  |  |  |  |  |  |  |  |  |
Grant funding liability |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  | 1,100,000 |  |
Funding received for research and development |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |  | 9,500,000 |  |
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | CELLECTRA 3PSP Proprietary Smart Device |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, funding to be received |  |  |  |  | $ 5,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | INO-4800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative agreement, funding to be received |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Bill And Melinda Gates Foundation | Collaborative Arrangement, Product | DNA-Encoded Monoclonal Antibody Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grant funding liability |  |  |  |  |  |  |  |  |  |  |  | 703,000 |  |  | 703,000 |  |
Funding received for research and development |  |  |  |  |  |  |  | $ 1,100,000 | $ 2,200,000 |  |  | 164,000 | $ 1,500,000 |  | 334,000 | $ 4,600,000 |
Bill And Melinda Gates Foundation | Collaborative Arrangement, Product | CELLECTRA 3PSP Proprietary Smart Device |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grant funding liability |  |  |  |  |  |  |  |  |  |  |  | 3,100,000 |  |  | 3,100,000 |  |
Funding received for research and development |  |  |  |  |  | $ 5,000,000.0 |  |  |  |  |  | 943,000 |  |  | 1,900,000 |  |
Department of Defence | Collaborative Arrangement, Product |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contra-research and development expense |  |  |  |  |  |  |  |  |  |  |  | 7,700,000 |  |  | 7,700,000 |  |
Accounts receivable |  |  |  |  |  |  |  |  |  |  |  | $ 7,700,000 |  |  | $ 7,700,000 |  |
Department of Defence | Collaborative Arrangement, Product | CELLECTRA 3PSP Proprietary Smart Device |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Funding received for research and development |  |  |  | $ 54,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Department of Defence | Collaborative Arrangement, Product | CELLECTRA 2000 Device |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price, procurement contract |  |  |  | $ 16,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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