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Subsequent Event (Tables) | 12 Months Ended
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Dec. 31, 2018
Subsequent Event [Abstract] |
Schedule of Increases in Base Salaries |
﻿ |  |  |  |  |  |
﻿Name |  | 2018 Base Salary |  | 2019 Base Salary
﻿Michael Hunkapiller, Ph.D. |  | $ | 1.00 |  | $ | 582,900
﻿Susan K. Barnes |  | $ | 1.00 |  | $ | 401,500
﻿

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