Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Warrants issued and outstanding (Details)

v3.20.1
Stockholders' Equity - Warrants issued and outstanding (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Dec. 17, 2018
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]      
Warrants Outstanding   715,939 101,847
Warrants [Roll Forward]      
Warrants, Outstanding at the beginning of the period   728,439  
Expired   (12,500)  
Warrants, Outstanding at the end of the period   715,939  
Weighted average exercise price, Outstanding at the beginning of the period   $ 20.99  
Expired (in dollars per share)   20.00  
Weighted average exercise price, Outstanding at the end of the period   $ 21.01  
Weighted average remaining contractual term, Outstanding at the end of the period   2 years 3 months 7 days  
License Agreement with Carnegie Mellon University      
Class of Stock [Line Items]      
Exercise Price $ 10.00    
Warrants [Roll Forward]      
Stock Issued During Period, Shares, Purchase of Assets   820,000  
Fully-diluted common stock held (in percent) 8.20%    
Funding Amount $ 2