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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)
Total
USD ($)
7.5% Series A-1 Convertible Preferred Stock [Member]
USD ($)
7.5% Series A-2 Convertible Preferred Stock [Member]
USD ($)
7.5% Series B Convertible Preferred Stock [Member]
USD ($)
Preferred Stock [Member]
7.5% Series A-1 Convertible Preferred Stock [Member]
USD ($)
Preferred Stock [Member]
7.5% Series A-2 Convertible Preferred Stock [Member]
USD ($)
Preferred Stock [Member]
7.5% Series B Convertible Preferred Stock [Member]
USD ($)
Common Stock [Member]
USD ($)
Common Stock [Member]
7.5% Series A-1 Convertible Preferred Stock [Member]
USD ($)
Common Stock [Member]
7.5% Series A-2 Convertible Preferred Stock [Member]
USD ($)
Common Stock [Member]
7.5% Series B Convertible Preferred Stock [Member]
USD ($)
Additional Paid-in Capital [Member]
USD ($)
Additional Paid-in Capital [Member]
7.5% Series A-1 Convertible Preferred Stock [Member]
USD ($)
Additional Paid-in Capital [Member]
7.5% Series A-2 Convertible Preferred Stock [Member]
USD ($)
Additional Paid-in Capital [Member]
7.5% Series B Convertible Preferred Stock [Member]
USD ($)
Accumulated Deficit [Member]
USD ($)
Accumulated Deficit [Member]
7.5% Series A-1 Convertible Preferred Stock [Member]
Accumulated Deficit [Member]
7.5% Series A-2 Convertible Preferred Stock [Member]
USD ($)
Accumulated Deficit [Member]
7.5% Series B Convertible Preferred Stock [Member]
USD ($)
BALANCE at Dec. 31, 2009 $ (27,173,284)                $ 12,195       $ 27,742,913       $ (54,928,392)      
BALANCE, shares at Dec. 31, 2009                  18,310,339                      
Common stock issued for:                                      
Convertible debenture principal/Payment of debt obligation 835,483                468       835,015               
Convertible debenture principal/Payment of debt obligation, shares                  703,770                      
Convertible debenture interest 446,913                240       446,673               
Convertible debenture interest, shares                  359,630                      
Employee and director compensation 19,725                7       19,718               
Employee and director compensation, shares                  10,000                      
Services 34,000                17       33,983               
Services, shares                  25,000                      
Stock-based compensation 125,955                         125,955               
Cashless exercise of warrants and options 2,156,149                1,058       2,155,091               
Cashless exercise of warrants and options, shares                  1,589,995                      
Reclassification of warrant derivative liability 2,686,431                         2,686,431               
Exchange of debt (principal and accrued interest) for convertible preferred stock 72,559,141       14 6             72,559,121               
Exchange of debt (principal and accrued interest) for convertible preferred stock, shares         20,912 8,484                            
Issuance of convertible preferred stock   2,127,787   35,749,400 1    24             2,127,786   35,749,376        
Issuance of convertible preferred stock, shares         863    35,749                            
Issuance costs on convertible preferred stock (2,571,588)                         (2,571,588)               
Contingent dividend related to convertible preferred stock (2,003,688)                      (2,003,688)               
Deemed dividend on beneficial conversion feature related to convertible preferred stock 39,482,123                         39,482,123              
Conversion of convertible preferred stock into common stock             (1)        104       (103)           
Conversion of convertible preferred stock into common stock, shares            (102)        155,929                  
Net loss (60,326,419)                                  (60,326,419)      
BALANCE at Dec. 31, 2010 24,666,005       15 5 24 14,089       139,906,683       (115,254,811)      
BALANCE, shares at Dec. 31, 2010         21,775 8,382 35,749 21,154,663                      
Common stock issued for:                                      
Employee and director compensation 980,000                200       979,800               
Employee and director compensation, shares                  300,000                      
Payment of dividends 0                782       (782)               
Payment of dividends, shares                  1,174,604                      
Purchase of mineral property, properties, plant and equipment 430,000                128       429,872               
Purchase of mineral property, properties, plant and equipment, shares                  192,600                      
Services 8,125                2       8,123               
Services, shares                  2,500                      
Issuance of convertible preferred stock 1,931,999                         1,931,999               
Issuance of convertible preferred stock, shares   862.5     862                               
Contingent dividend related to convertible preferred stock (15,954)                      (15,954)               
Deemed dividend on beneficial conversion feature related to convertible preferred stock 638,276                         638,276               
Conversion of convertible preferred stock into common stock              (1) (4)     1,749 2,358     (1,748) (2,354)          
Conversion of convertible preferred stock into common stock, shares            (1,710) (5,842)     2,625,514 3,540,749                
Stock-based compensation 203,731                         203,731               
Net loss (11,606,231)                               (11,606,231)      
BALANCE at Dec. 31, 2011 16,597,675       15 4 20 19,308       143,439,370       (126,861,042)      
BALANCE, shares at Dec. 31, 2011         22,637 6,672 29,907 28,990,630                      
Common stock issued for:                                      
Convertible debenture principal/Payment of debt obligation 75,000                21       74,979               
Convertible debenture principal/Payment of debt obligation, shares                  31,721                      
Public offering 26,549,997                8,875       26,541,122               
Public offering, shares                  13,325,521                      
Public offering issuance costs (2,858,871)                         (2,858,871)               
Vested restricted stock                   406       (406)               
Vested restricted stock, shares                  609,500                      
Payment of dividends                   1,431       (1,431)               
Payment of dividends, shares                  2,148,934                      
Purchase of mineral property, properties, plant and equipment 444,700                114       444,586               
Purchase of mineral property, properties, plant and equipment, shares                  170,986                      
Cashless exercise of warrants and options                82       (82)               
Cashless exercise of warrants and options, shares               122,848                      
Issuance of convertible preferred stock 2,466,750       1                2,466,749               
Issuance of convertible preferred stock, shares   862.5     862                              
Contingent dividend related to convertible preferred stock (6,009)                      (6,009)               
Deemed dividend on beneficial conversion feature related to convertible preferred stock 1,242,927                         1,242,927               
Conversion of convertible preferred stock into common stock                 (1)     1,433 609     (1,432) (608)          
Conversion of convertible preferred stock into common stock, shares            (1,401) (1,508)     2,152,217 913,910                
Stock-based compensation 5,887,593                        5,887,593               
Net loss (30,762,273)                                  (30,762,273)      
BALANCE at Dec. 31, 2012 $ 18,394,562       $ 16 $ 4 $ 19 $ 32,279       $ 175,985,559       $ (157,623,315)      
BALANCE, shares at Dec. 31, 2012         23,499 5,271 28,399 48,466,267