Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Deficit, Preferred Units/Stock (Details)

v3.19.3
Stockholders' Deficit, Preferred Units/Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
May 13, 2019
May 10, 2019
May 06, 2019
Feb. 12, 2019
Dec. 12, 2018
Dec. 31, 2018
Jun. 30, 2019
Jun. 30, 2019
Oct. 22, 2018
Class of Stock [Line Items]                  
Unit price (in dollars per share)         $ 1.95        
Net proceeds from issuance of stock         $ 2.7        
Share issuance costs         $ 0.1        
Shares outstanding (in shares)     2,633,678       1,707,920 1,707,920  
Series A Preferred Units [Member]                  
Class of Stock [Line Items]                  
Shares issued in private placement (in shares)       62,500   2,162,536      
Preferred stock, par value (in dollars per share)           $ 0.001 $ 0.001 $ 0.001  
Unit price (in dollars per share)       $ 2.40   $ 2.40      
Net proceeds from issuance of stock       $ 0.2   $ 4.7      
Share issuance costs           $ 0.5      
Shares issued in stock conversion (in shares)     2,460,517            
Shares outstanding (in shares)           2,391,403 0 0  
Series E Preferred Stock [Member]                  
Class of Stock [Line Items]                  
Preferred stock, par value (in dollars per share)                 $ 0.99
Shares issued in stock conversion (in shares) 300,000 875,000              
Shares acquired (in shares)     2,633,678            
Shares converted (in shares) 236,364 689,394         925,758 925,758  
Shares outstanding (in shares)             1,707,920 1,707,920  
Preferred stock, shares issuable upon conversion (in shares)             2,167,745 2,167,745