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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 1 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2019 | Jun. 15, 2012 | Jun. 30, 2020 | Jun. 30, 2019
Oak Ridge National Laboratory [Member] |  |  |  |
Commitments and Contingencies (Textual) |  |  |  |
Purchase of materials | $ 300 |  | $ 100 | $ 100
License and Sponsored Research Agreement [Member] | Fred Hutchinson Cancer Research Center [Member] |  |  |  |
Commitments and Contingencies (Textual) |  |  |  |
Description of royalty payment |  | Royalty payments of 2% of net sales will be due to FHCRC. |  |
Milestone payment |  | $ 1,000 |  |

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