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Common Stock (Details Narrative)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 14, 2018
USD ($)
$ / shares
shares
Jun. 14, 2018
USD ($)
$ / shares
shares
May 03, 2018
USD ($)
shares
Apr. 18, 2018
USD ($)
a
shares
Sep. 27, 2017
USD ($)
shares
Sep. 25, 2017
USD ($)
shares
Apr. 14, 2017
USD ($)
Mar. 09, 2017
USD ($)
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
Proceeds from common stock                 $ 4,730 $ 13,705
Fair value of shares issued                 95
Number of shares issued for services | shares     172,727              
Number of shares issued for services, value     $ 95           95  
Option Agreement [Member]                    
Number of common stock issued | shares       200,000            
Fair value of shares issued       $ 114            
Mining claims covering area | a       3,000            
ATM Offering [Member]                    
Net proceeds from direct offering             $ 30,000 $ 8,000 $ 500  
Sales commission percentage             2.50%      
Number of common stock sold | shares                 1,068,896  
Available for future sales             $ 28,400   $ 7,800  
ATM Offering [Member] | August 8, 2018 [Member]                    
Net proceeds from direct offering                 $ 1,600  
Number of common stock sold | shares                 1,742,749  
Aspire Capital Fund LLC [Member]                    
Net proceeds from direct offering $ 2,900                  
Number of common stock issued | shares 3,717,773                  
Average price per shares issued | $ / shares $ 0.34 $ 0.34                
Proceeds from common stock $ 1,300                  
Warrant purchase price per share | $ / shares $ 0.01 $ 0.01                
Warrant exercisable term Jun. 14, 2021                  
Aspire Capital Fund LLC [Member] | Common Stock Purchase Agreement [Member]                    
Net proceeds from direct offering           $ 22,000        
Number of common stock issued | shares   2,725,096     1,428,571 880,000        
Proceeds from common stock   $ 1,500     $ 2,000          
Aspire Capital Fund LLC [Member] | Common Stock Warrants [Member]                    
Number of warrants issued for common stock | shares 4,968,518 4,968,518                
Prefunded warrants price per share | $ / shares $ 0.33 $ 0.33                
Net proceeds of warrants $ 1,600                  
Alabama Graphite [Member]                    
Number of common stock issued | shares                 11,625,210  
Ownership percentage                 100.00%