Commitments and Contingencies (Details Textual) - USD ($) |
1 Months Ended | 3 Months Ended | |||
|---|---|---|---|---|---|
Dec. 19, 2018 |
Jun. 15, 2012 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Feb. 16, 2016 |
|
| Goodwin [Member] | |||||
| Commitments and Contingencies (Textual) | |||||
| Research and development costs | $ 900,000 | $ 400,000 | |||
| Oak Ridge National Laboratory [Member] | |||||
| Commitments and Contingencies (Textual) | |||||
| Purchase of materials | $ 200,000 | 100,000 | 100,000 | ||
| Fred Hutchinson Cancer Research Center [Member] | License and Sponsored Research Agreement [Member] | |||||
| Commitments and Contingencies (Textual) | |||||
| Description of royalty payment | Royalty payments of 2% of net sales will be due to FHCRC. | ||||
| Milestone payment | $ 1,000,000 | ||||
| Medpace Inc [Member] | |||||
| Commitments and Contingencies (Textual) | |||||
| Total project estimated to cost | $ 10,200,000 | ||||
| Research and development costs | $ 400,000 | $ 600,000 | |||
| Project remaining cost | $ 3,100,000 | ||||