XML 53 R43.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders' Equity - Warrants (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 25, 2018
Jul. 17, 2018
Apr. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Class Of Stock [Line Items]                  
Warrant exercise price (in dollars per share)       $ 2.25     $ 2.25    
Common stock issued (in shares)             3,450,000    
Sale of Stock, Price Per Share       $ 5.00     $ 5.00    
Warrants expected term       5 years     5 years    
Warrant liability       $ 242,000     $ 242,000   $ 6,929,000
Change in fair value of warrants       $ (756,000) $ (282,000)   $ (2,423,000) $ (492,000)  
Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Class of warrant outstanding       3,362,500     3,362,500    
Number of warrants exercised             3,362,500    
Warrant liability       $ 4,300,000     $ 4,300,000    
Change in fair value of warrants       $ 800,000          
Representative Warrants [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)       75,000     75,000    
Warrant exercise price (in dollars per share)       $ 6.25     $ 6.25    
Common Stock [Member]                  
Class Of Stock [Line Items]                  
Common stock issued (in shares)         5,000,000 139,855,000      
Warrants expected term       5 years     5 years    
Series C Convertible Preferred Stock [Member]                  
Class Of Stock [Line Items]                  
Conversion Price Per Share     $ 3.2132            
Preferred stock conversion price reduced (in dollars per share)     $ 2.25            
Common Class A                  
Class Of Stock [Line Items]                  
Common stock issued (in shares)             289,000    
Common Class B                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)       2,711,000     2,711,000    
2018 Rights Offering [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)   1              
Common stock issued (in shares) 6,723                
Gross proceeds from private placement of stock $ 5,700,000                
2018 Rights Offering [Member] | Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)   1,050              
2018 Rights Offering [Member] | Common Stock and Series B Convertible Preferred Stock [Member]                  
Class Of Stock [Line Items]                  
Charge on Non Transferable Subscription Rights   $ 0              
2018 Rights Offering [Member] | Series C Convertible Preferred Stock [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)   20,000              
2018 Rights Offering [Member] | Series C Convertible Preferred Stock [Member] | Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Warrant exercise price (in dollars per share)   $ 1,000              
2018 Rights Offering [Member] | Common Stock [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)     1            
2018 Rights Offering [Member] | Common Stock [Member] | Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)     50            
Series T Warrants [Member] | 2018 Rights Offering [Member] | Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Class of warrant outstanding       3,788,400     3,788,400    
Number of warrants exercised             75,768    
Series U Warrants [Member] | Outstanding Warrants [Member]                  
Class Of Stock [Line Items]                  
Number of shares callable by warrants (in shares)       3,415,000     3,415,000