Annual report pursuant to Section 13 and 15(d)

Liquidity and Financial Condition (Details)

v3.20.1
Liquidity and Financial Condition (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 14, 2018
May 24, 2019
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Jan. 31, 2019
Jan. 28, 2019
Dec. 31, 2017
Cash and cash equivalents       $ 7,440,000 $ 225,000     $ 41,652,000
Working capital       9,300,000        
Stockholders' equity       26,235,000 4,491,000     $ 49,627,000
Accumulated deficit       217,238,000 197,199,000      
Total investment           $ 3,000,000    
Proceeds from the sale of stock       $ 24,825,000      
Weighted average price       $ 2.97        
H.C. Wainwright [Member]                
Proceeds from the sale of stock       $ 9,500,000        
Stock issued during period       5,995,559        
Common Stock [Member]                
Stock issued during period 100,000   100,000   3,215      
Common Stock [Member] | H.C. Wainwright [Member]                
Maximum amount of sales shares   $ 100,000,000            
Percentage of commission   3.00%            
Proceeds from the sale of stock   $ 100,000,000   $ 23,800,000        
Stock issued during period   8,351,762            
Investors [Member] | Senior Secured Convertible Promissory Notes [Member]                
Debt instrument face amount           $ 3,400,000 $ 3,400,000