v3.21.1
Condensed Consolidated Statements of Stockholders’ Equity (Deficit) - USD ($)
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2019   34,274,000    
Beginning Balance at Dec. 31, 2019 $ 3,614,000 $ 3,000 $ 106,188,000 $ (102,577,000)
Equity        
Stock-based compensation expense 328,000   328,000  
Issue stock for warrant exercises (in shares)   3,478,000    
Issue stock for warrant exercises 2,355,000 $ 0 2,355,000  
Net loss (10,510,000)     (10,510,000)
Ending Balance (in shares) at Mar. 31, 2020   37,752,000    
Ending Balance at Mar. 31, 2020 (4,213,000) $ 3,000 108,871,000 (113,087,000)
Beginning Balance (in shares) at Dec. 31, 2020   189,953,000    
Beginning Balance at Dec. 31, 2020 $ 35,082,000 $ 19,000 178,747,000 (143,684,000)
Equity        
Stock option exercises (in shares) 102,000 102,000    
Stock option exercises $ 333,000   333,000  
Stock-based compensation expense 371,000   371,000  
Issue common stock, net of issuance costs (in shares)   78,000,000    
Issue common stock, net of issuance costs 327,486,000 $ 8,000 327,478,000  
Issue stock for warrant exercises (in shares)   10,739,000    
Issue stock for warrant exercises 9,393,000 $ 1,000 9,392,000  
Net loss (9,947,000)     (9,947,000)
Ending Balance (in shares) at Mar. 31, 2021   278,794,000    
Ending Balance at Mar. 31, 2021 $ 362,718,000 $ 28,000 $ 516,321,000 $ (153,631,000)