XML 72 R58.htm IDEA: XBRL DOCUMENT v3.19.1
Stockholders' Equity - Common Stock (Details) - USD ($)
 3 Months Ended 7 Months Ended 12 Months Ended
Sep. 21, 2018
Jul. 25, 2018
Jun. 01, 2018
Nov. 28, 2017
May 31, 2017
Apr. 11, 2017
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Common Stock [Abstract]                    
Common stock issued (in shares)   6,723   10,000            
Common stock issued, value                 $ 1,624,000 $ 12,716,000
Common Stock [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)   6,723   10,000         4,608,453 1,223,708
Share issued, price per share           $ 11.00        
Common stock issued, value                 $ 5,000 $ 1,000
Common Stock [Member] | Maxim Group LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)         84,900 900,000        
Share issued, price per share         $ 11.00 $ 10.40        
Proceeds from sale of common stock, net         $ 800,000 $ 8,700,000        
Closing of offering date           Apr. 17, 2017        
Number of days granted as option to purchase additional shares of common stock to underwriter           45 days        
Additional shares of common stock           94,400        
Common Stock [Member] | B. Riley FBR [Member] | Sales Agreement [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)               3,900,000    
Proceeds from sale of common stock, net               $ 1,700,000    
Common Stock [Member] | B. Riley FBR [Member] | Sales Agreement [Member] | Maximum [Member]                    
Common Stock [Abstract]                    
Proceeds from sale of common stock, net     $ 6,500,000              
Common Stock [Member] | B. Riley FBR [Member] | ATM Program [Member] | Sales Agreement [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)               3,900,000    
Proceeds from sale of common stock, net               $ 1,700,000    
Common Stock [Member] | B. Riley FBR [Member] | ATM Program [Member] | Sales Agreement [Member] | Maximum [Member]                    
Common Stock [Abstract]                    
Proceeds from sale of common stock, net     $ 6,500,000              
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued, value $ 5,000,000                  
Period exercisable from the date of issuance 24 months                  
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Securities Purchase Agreement [Member]                    
Common Stock [Abstract]                    
Trading Volume of Common Shares 0                  
Upper Limit on the Price Per Share $ 0                  
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Maximum [Member]                    
Common Stock [Abstract]                    
Beneficial ownership percentage of common stock outstanding 4.99%                  
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Maximum [Member] | Single Regular Purchase [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares) 250,000                  
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Minimum [Member] | Single Regular Purchase [Member]                    
Common Stock [Abstract]                    
Common stock issued, value $ 1,000,000                  
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Purchase Agreement [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)             600,000      
Proceeds from sale of common stock, net             $ 300,000      
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member] | Purchase Agreement [Member] | Maximum [Member]                    
Common Stock [Abstract]                    
Floor price of per share $ 0.25