Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.20.1
Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2020
Feb. 29, 2020
Jan. 31, 2020
Sep. 30, 2018
Sep. 20, 2018
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Mar. 16, 2020
Dec. 31, 2017
Subsequent Event [Line Items]                    
Cumulative net cash proceeds from exercise of warrants       $ 3,300     $ 1,603 $ 3,268    
Stockholders' equity             $ 1,433 $ 6,831   $ 857
Class B Units [Member]                    
Subsequent Event [Line Items]                    
Issuance of common stock, net (in shares)         8,225          
Subsequent Event                    
Subsequent Event [Line Items]                    
Issuance of common stock, net (in shares)     8,700,000              
Number of warrants to purchase     8,700,000              
Exercise price     $ 0.25              
Net cash proceeds     $ 1,900     $ 8,000        
Stockholders' equity                 $ 5,300  
Subsequent Event | Placement Warrants [Member] | Class B Units [Member]                    
Subsequent Event [Line Items]                    
Number of warrants to purchase 27,388,464 27,388,464 27,388,464              
Cumulative net cash proceeds from exercise of warrants $ 6,200 $ 6,200 $ 6,200