Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Textual)

v3.19.1
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