XML 59 R48.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders' Equity - Common Stock Issuances - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
May 05, 2020
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Stockholders Equity Note [Line Items]                
Warrant exercise price   $ 10.00       $ 10.00    
Net proceeds from Public Offering           $ 19,378 $ 0  
Conversion price $ 10.00              
Conversion of Preferred stock into common stock           1,549,609    
Exercise of pre-funded Series D Warrants (in shares)           6,000    
Common stock shares issued           72,976    
Remaining Warrants exercise price   10.00       $ 10.00    
Series F warrants [Member]                
Stockholders Equity Note [Line Items]                
Warrants issued to purchase of common stock 2,224,900              
Warrant exercise price $ 10.00              
Warrants issued to purchase of common stock 2,224,900              
Remaining Warrants exercise price $ 10.00              
Pre-Funded Warrants [Member]                
Stockholders Equity Note [Line Items]                
Warrants issued to purchase of common stock 377,000              
Warrants issued to purchase of common stock 377,000              
Common Stock [Member]                
Stockholders Equity Note [Line Items]                
Warrants issued to purchase of common stock           371,000    
Warrant exercise price   $ 0.01       $ 0.01    
Warrants issued to purchase of common stock           371,000    
Net proceeds from Public Offering $ 22,000              
Conversion of Preferred stock into common stock   1,549,609 2,915          
Exercise of pre-funded Series D Warrants (in shares)   6,000   5,399 5,885      
Remaining Warrants exercise price   $ 0.01       $ 0.01    
Common Stock [Member] | IPO [Member]                
Stockholders Equity Note [Line Items]                
Shares issued in public offering 1,823,000              
2019 Warrants [Member]                
Stockholders Equity Note [Line Items]                
Warrant exercise price $ 10.00             $ 23.04
Net proceeds from Public Offering $ 22,000              
Remaining Warrants exercise price $ 10.00             $ 23.04