v2.4.0.6
Debt and Debt Guarantee - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 2 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 6 Months Ended
Apr. 30, 2012
Mar. 31, 2012
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Notes Payable - other
Installment
Mar. 26, 2012
Notes Payable
Mar. 31, 2012
Notes Payable
Dec. 31, 2011
Notes Payable
Dec. 31, 2010
Notes Payable
Apr. 30, 2012
24% Note Transaction
Demand Notes Payable
Jun. 30, 2012
24% Note Transaction
Demand Notes Payable
Dec. 31, 2011
24% Note Transaction
Demand Notes Payable
Apr. 30, 2012
6% Note Transaction
Demand Notes Payable
Jun. 30, 2012
6% Note Transaction
Demand Notes Payable
Dec. 31, 2011
6% Note Transaction
Demand Notes Payable
Sep. 30, 2009
Convertible Debentures - 2009
Dec. 31, 2010
Convertible Debentures - 2009
Jun. 30, 2012
Convertible Debentures - 2009
Dec. 31, 2011
Convertible Debentures - 2009
Aug. 13, 2011
Convertible Debentures - 2009
Second Amended And Restated Credit Agreement
Jul. 31, 2011
Convertible Debentures - 2010
Jun. 30, 2012
Convertible Debentures - 2010
Dec. 31, 2011
Convertible Debentures - 2010
Dec. 31, 2010
Convertible Debentures - 2010
Dec. 31, 2009
Convertible Debentures - 2010
May 31, 2011
Convertible Debentures - 2010
Jul. 31, 2011
Convertible Debentures - 2010
Amended and Restated Credit Agreement
May 31, 2011
Convertible Debentures - 2010
Amended and Restated Credit Agreement
Nov. 30, 2010
Convertible Debentures - 2010
Amended and Restated Credit Agreement
Jun. 30, 2012
Convertible Debentures - 2010
Second Amended And Restated Credit Agreement
Dec. 31, 2011
Convertible Debentures - 2010
Transaction debenture 2
Mar. 31, 2012
Convertible Debentures - 2010
Transaction Debenture 1
Dec. 31, 2011
Convertible Debentures - 2010
Transaction Debenture 1
Dec. 31, 2010
Convertible Debentures - 2010
Transaction Debenture 1
Jun. 30, 2012
Convertible Debentures
Debt Instrument [Line Items]                                                                                
Notes payable               $ 202,484         $ 25,000 $ 25,000     $ 71,000     $ 79,980                                        
Debt interest rate                         12.00% 12.00%     24.00%     6.00%                                        
Accrued interest Expense     75,115   372,133 460,704 783,360         1,244 5,082     6,211 5,929   2,688 0                                        
Note payable and accrued interest                     46,819   45,575   83,140   76,929 82,668                                            
Number of common stock due to conversion of Note payable and accrued interest                     187,277       332,561     330,671                                            
Common stock, fair market value per share                     $ 0.25       $ 0.25     $ 0.25                                            
Acquisition of mineral properties                   300,000                                                            
Acquisition of mineral properties, cash paid                   50,000                                                            
Acquisition of mineral properties, notes payable assumed                   250,000                                                            
Number of installment for acquisition payment                   3                                                            
Debt, maturity start date                   Oct. 31, 2011                     Aug. 13, 2010       Aug. 13, 2012                              
Debt, maturity end date                   Dec. 31, 2011                     Sep. 15, 2010       Sep. 15, 2012                              
Short term note from officer     39,200     39,200                                                                    
Convertible debenture, face amount                                         1,000,000           198,000   1,462,774             1,700,918        
Convertible debenture, interest rate                                         18.00%               24.00%                      
Convertible debenture, expected principal payment                                         500,000                                      
Convertible debenture, conversion price per share $ 0.25 $ 0.25   $ 0.25       $ 0.25 $ 0.35                       $ 0.35 $ 0.25             $ 0.90         $ 0.25            
Convertible debenture, conversion price as percentage of five proceeding days of weighted average closing price                                         25.00% 25.00%                                    
Warrants issued (in shares)                 442,857                       2,857,142 2,857,142               2,857,142                    
Warrants exercise price     0.40     0.40   0.40 0.50                       0.50 0.50               0.50                    
Number of days used to determining conversion price                                         5 days 5 days                                    
Warrant exercise term               2 years                         2 years                 2 years                    
Convertible debenture, discount to average closing price of five proceeding days                                           $ 0.25                                    
Warrants issued with debt                                         581,626                                      
Convertible debenture converted to stock (in shares) 1,725,580 10,927,289           4,363,611 1,000,000                                                              
Convertible debenture converted to stock 431,395 2,731,822       3,163,218   1,090,902 350,000                                                              
Convertible debenture                                             633,306 633,306       2,164,205                        
Convertible debenture, maturity date                                                         May 17, 2011                      
Beneficial conversion feature issued on convertible debenture               472,377                                                       472,377     515,271  
Amortization of Discount on convertible debenture           212,070 444,993 646,760 512,839                                                     260,306 202,517 386,453    
Line of credit facility, maximum borrowing capacity                                                   1,800,000         1,500,000 2,000,000 1,800,000   3,000,000          
Line of credit facility, royalty interest rate                                                   3.00% 6.00% 6.00%             3.00%          
Line of credit facility amended payment period, due                                                                     1 year          
Line of credit facility amended payment period                                                                     Nov. 17, 2012          
Prepaid royalty interest                                                     113,164 113,164                        
Amortized prepaid financing charge                                                     42,437 35,364                        
Prepaid expenses           (39,812) (4,257)                                         77,800                        
Royalty paid                                                       4,418                        
Royalty earned                                                       4,418                        
Gain on forgiveness of debt     235,985 86,746   322,731                                         77,800                         158,185
Convertible debenture, discount                                                     $ 0 $ 212,070