Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Deficit)

v3.19.2
Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
May 2019 Public Offering
January 2019 Public Offering
Over-Allotment Option
2018 Public Offering
Officers and Directors Purchase Plan
Common Stock
Common Stock
May 2019 Public Offering
Common Stock
January 2019 Public Offering
Common Stock
Over-Allotment Option
Common Stock
2018 Public Offering
Common Stock
Restricted Stock Units (RSUs)
Common Stock
Officers and Directors Purchase Plan
Additional Paid-in Capital
Additional Paid-in Capital
May 2019 Public Offering
Additional Paid-in Capital
January 2019 Public Offering
Additional Paid-in Capital
Over-Allotment Option
Additional Paid-in Capital
2018 Public Offering
Additional Paid-in Capital
Officers and Directors Purchase Plan
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2017             27,554,076                          
Beginning balance at Dec. 31, 2017 $ 58,965           $ 27             $ 113,780           $ (54,842)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                        
Stock-based compensation 492                         492            
Common stock issued during period (in shares)                   1,072,500 10,085,500 65,600 2,034              
Common stock issued during period       $ 2,103 $ 26,647 $ 4       $ 2 $ 10           $ 2,101 $ 26,637 $ 4  
Modification of Interstate Battery warrant 1 1,002                         1,002            
Net loss (17,459)                                     (17,459)
Ending balance (in shares) at Jun. 30, 2018             38,779,710                          
Ending Balance at Jun. 30, 2018 71,754           $ 39             144,016           (72,301)
Beginning balance (in shares) at Mar. 31, 2018             28,694,210                          
Beginning balance at Mar. 31, 2018 53,684           $ 29             116,029           (62,374)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                        
Stock-based compensation 348                         348            
Common stock issued during period (in shares)                     10,085,500                  
Common stock issued during period         $ 26,647           $ 10             $ 26,637    
Modification of Interstate Battery warrant 1 1,002                         1,002            
Net loss (9,927)                                     (9,927)
Ending balance (in shares) at Jun. 30, 2018             38,779,710                          
Ending Balance at Jun. 30, 2018 71,754           $ 39             144,016           (72,301)
Beginning balance (in shares) at Dec. 31, 2018             38,932,437                          
Beginning balance at Dec. 31, 2018 50,090           $ 39             145,147           (95,096)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                        
Stock-based compensation 1,998                         1,998            
Warrants related to Veolia agreement 2,312                         2,312            
Common stock issued during period (in shares)               11,000,000 5,175,000     357,168                
Common stock issued during period   $ 20,317 $ 9,063         $ 11 $ 5           $ 20,306 $ 9,058        
Common stock issued for consulting services (in shares)             1,425,271                          
Common stock issued for consulting services 3,044           $ 2             3,042            
Net loss (22,209)                                     (22,209)
Ending balance (in shares) at Jun. 30, 2019             56,889,876                          
Ending Balance at Jun. 30, 2019 64,615           $ 57             181,863           (117,305)
Beginning balance (in shares) at Mar. 31, 2019             44,727,697                          
Beginning balance at Mar. 31, 2019 50,278           $ 45             157,037           (106,804)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                        
Stock-based compensation 930                         930            
Warrants related to Veolia agreement 1,734                         1,734            
Common stock issued during period (in shares)                       39,350                
Common stock issued during period 0                                      
Common stock issued for consulting services (in shares)             1,122,829 11,000,000                        
Common stock issued for consulting services 1,857 $ 20,317         $ 1 $ 11           1,856 $ 20,306          
Net loss (10,501)                                     (10,501)
Ending balance (in shares) at Jun. 30, 2019             56,889,876                          
Ending Balance at Jun. 30, 2019 $ 64,615           $ 57             $ 181,863           $ (117,305)