Stockholders' Equity - Issuances Related to the License Agreement (Details) - License Agreement - ABX	Sep. 29, 2017 item shares
Issuances Related to the License Agreement
Common stock issued per agreement	2,000,000
Number Of Warrants Issued Per Agreement | item	2
Stock Issued During Period Shares Warrant Exercise	3,278,000
Number of warrants exercised | item	1
Aggregate number of common stock shares that may be purchased by exercise of warrants	4,000,000
Number of shares of common stock filed on registration statement per Registration Rights Agreement	6,000,000
Period of time after license agreement settled the registration statement was required to be filed	45 days