Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Narrative (Details)

v3.20.2
Stockholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Jun. 23, 2020
Apr. 01, 2020
Mar. 31, 2020
Jan. 30, 2019
Nov. 30, 2019
Aug. 31, 2019
Jun. 30, 2020
Dec. 31, 2019
Jan. 31, 2019
Class of Stock [Line Items]                  
Common stock, shares authorized (in shares)             300,000,000 300,000,000  
Common stock, shares issued (in shares)             52,399,152 55,212,437  
Common stock, shares outstanding (in shares)             52,399,152 55,212,437  
Par value of common stock (USD per share)             $ 0.001 $ 0.001  
Preferred stock, shares authorized (in shares)             10,000,000 10,000,000  
Preferred stock, shares issued (in shares)             14,429 11,429  
Preferred stock, shares outstanding (in shares)             14,429 11,429  
Par value of preferred stock (USD per share)             $ 0.001 $ 0.001  
Number of shares included with each unit (in shares)         1        
Number of warrants included with each unit (in shares)         1        
Gross sales proceeds from common stock           $ 50.0      
Preferred share exchange                  
Class of Stock [Line Items]                  
Shares of stock sold, price per share (in dollars per share)         $ 3.43        
Beneficial conversion feature         $ 2.8        
Private placement                  
Class of Stock [Line Items]                  
Shares of stock sold (in shares)         9,014,960        
Shares of stock sold, price per share (in dollars per share)         $ 3.55        
Shares of stock sold, gross consideration         $ 32.0        
Shares of stock sold, net consideration         $ 31.0        
Stock issued upon conversion (shares)         0.001        
Notice period before increase of Beneficial Ownership Limitation         60 days        
Warrants, exercise price (in dollars per share)         $ 7.10        
Common Stock                  
Class of Stock [Line Items]                  
Number of securities called by each warrant         1        
Common Stock | Stock exchange, shares from existing shareholders                  
Class of Stock [Line Items]                  
Shares of stock sold (in shares)   3,000,000   5,000,000          
Preferred Stock | Preferred share exchange                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)                 5,000
Shares of stock sold (in shares)   3,000   5,000          
Series A Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares issued (in shares)             2,907 2,907  
Preferred stock, shares outstanding (in shares)             2,907 2,907  
Series B Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares issued (in shares)             5,000 5,000  
Preferred stock, shares outstanding (in shares)             5,000 5,000  
Series C Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares issued (in shares)             3,522 3,522  
Preferred stock, shares outstanding (in shares)             3,522 3,522  
Series D Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares issued (in shares)             3,000 0  
Preferred stock, shares outstanding (in shares)             3,000 0  
Series D Preferred Stock | Preferred Stock                  
Class of Stock [Line Items]                  
Preferred stock, shares authorized (in shares)   3,000              
Par value of preferred stock (USD per share)     $ 0.001            
Stock issued upon conversion (shares)     1,000            
Notice period before increase of Beneficial Ownership Limitation     61 days            
Common stock ownership limit (as a percent)     9.99%            
Beneficial ownership limitation (as a percent)     19.99%            
2020 Employee, Director and Consultant Equity Incentive Plan                  
Class of Stock [Line Items]                  
Shares of stock authorized pursuant to the 2019 Plan (shares) 3,500,000                
2019 Plan                  
Class of Stock [Line Items]                  
Shares of stock terminated under the 2018 Plan (shares) 1,579,678                
Maximum | Private placement                  
Class of Stock [Line Items]                  
Warrants, term         5 years