Quarterly report pursuant to Section 13 or 15(d)

Organization (Details)

v3.20.2
Organization (Details)
1 Months Ended 9 Months Ended
Mar. 24, 2020
Aug. 30, 2020
May 31, 2020
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Aug. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2016
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]                
Reverse stock split 0.067              
Accumulated deficit       $ 195,127,000     $ 183,278,000  
Cash used in operations       7,015,000 $ 14,277,000      
Cash       $ 14,549,000     $ 10,872,000  
Reduction in workforce     35.00% 35.00%        
Debt covenant, unrestricted cash       $ 2,000,000        
Unrestricted cash       12,549,000        
Subsidiary, Sale of Stock [Line Items]                
Proceeds from warrant       3,334,000 $ 0      
Loan agreement                
Subsidiary, Sale of Stock [Line Items]                
Extinguishment of debt amount       1,512,000        
Received loan               $ 7,000,000
PWB loan agreement | Term loan                
Subsidiary, Sale of Stock [Line Items]                
Received loan       2,000,000   $ 2,000,000    
Debt term   3 years            
Direct offering                
Subsidiary, Sale of Stock [Line Items]                
Proceeds from direct offering       $ 7,082,000