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STOCK BASED COMPENSATION - (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2018
Nov. 30, 2015
Dec. 31, 2019
Dec. 31, 2018
Apr. 18, 2019
Dec. 13, 2017
Jul. 18, 2017
Anatolia Energy Limited              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of replacement options issued   7,495          
Sale of stock price per share   $ 0.00001096          
Number of replacement options outstanding     113        
Performance shares outstanding     0        
Alabama Graphite              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of replacement options outstanding     4,528        
Number of replacement options and warrants 50,168            
Replacement options and warrants shares exchange rate $ 0.0016            
Exercise prices for the option and warrant shares           $ 0.77809  
Number of replacement warrants outstanding     11,440        
Alabama Graphite | CAD Currency              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Exercise prices for the option and warrant shares $ 0.0016            
2013 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of common stock shares reserved for future issuance     45,886        
Stock-based compensation expense     $ 0.1 $ 0.3      
2013 Plan | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of common stock shares reserved for future issuance     66,278   66,000   20,000
Stock option vesting period     10 years