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Mortgage and Loans Payable - Additional Information (Detail) (USD $)
 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2014
Coins
Mar. 31, 2013
Jul. 31, 2013
May 10, 2012
Mar. 31, 2014
First Mortgage [Member]
Jul. 31, 2013
Term Loan [Member]
Mar. 31, 2014
Term Loan [Member]
Nov. 30, 2011
Senior Convertible Note [Member]
Investor
Mar. 31, 2014
Senior Convertible Note [Member]
Dec. 31, 2013
Senior Convertible Note [Member]
May 10, 2012
Senior Convertible Note [Member]
Mar. 31, 2014
Senior Convertible Note [Member]
Lender [Member]
Mar. 31, 2014
Additional Note [Member]
Jan. 02, 2013
Additional Note [Member]
May 10, 2012
Additional Note [Member]
Jul. 31, 2013
Project Term Loan [Member]
oz
Mar. 31, 2014
Project Term Loan [Member]
Jul. 31, 2013
Project Term Loan [Member]
Gairsoppa [Member]
May 31, 2008
Mortgage Payable [Member]
Mar. 31, 2014
Mortgage Payable [Member]
Jul. 11, 2008
Mortgage Payable [Member]
May 31, 2008
Mortgage Payable [Member]
First Mortgage [Member]
Debt Instrument [Line Items]                                            
Basis spread on variable rate, points     0.75%     5.00%                     5.00%     0.01% 0.75%  
Debt instrument description             one month LIBOR rate plus 500 basis points                   One-month LIBOR rate plus 500 basis points          
Maturity date             Jul. 31, 2016                   Jul. 24, 2014   May 14, 2015 Jul. 11, 2013    
Periodic payment           $ 500,000                         $ 5,080      
Secured collateral 25,000                                          
Value of secured collateral, percent 40.00%                                          
Company's consolidated debt         561,923                     10,000,000       1,216,000 2,580,000  
Loan origination fee paid at closing                                 50,000          
Restricted cash deposit for interest payments over the term of loan 400,000                               500,000          
Project term loan collateral value                                   10,000,000        
Loss recovered                               1,800,000            
Periodic payments, principal 10,750                                     10,750    
Interest rate description Prime rate plus three-fourths of one percent (0.75%)                                     Prime rate plus three-fourths of one percent (0.75%)    
New maturity date of mortgage loan                                       Jul. 31, 2016    
Principal amount of loan, outstanding                         2,347,826                 679,000
Interest rate, stated percentage                             9.00%       6.45%      
Original principal amount       8,000,000       10,000,000             8,000,000              
Warrant issued to purchase common stock 1,302,083             1,302,083                            
Original principal amount of repurchased note               5,000,000                            
Debt related expenses                 545,000     45,000                    
Number of institutional investor under securities purchase agreement               1                            
Indebtedness interest rate per year                 8.00%                          
Indebtedness interest rate per year under default condition                 15.00%                          
Original principal installments                 434,783                          
Note repayment commencing date                 Jul. 08, 2012                          
Debt instrument conversion reset conversion price description                 The reset conversion price applicable to the Initial Note was to be adjusted to the lesser of (a) the then current conversion price and (b) the greater of (i) $1.44 and (ii) 110.0% of the market price of our common stock on the six-month anniversary of the initial closing date (as applicable, the "Conversion Price").                          
Debt instrument conversion price                 $ 1.44                          
Debt instrument conversion price, percentage 125.00%               110.00%                          
Initial conversion price                 $ 3.74   $ 3.17     $ 3.17 $ 3.74              
Debt instrument amortization payment description                 The conversion rate applicable to any amortization payment that we make in shares of our common stock will be the lower of (a) the Conversion Price and (b) a price equal to 85.0% of the average for a ten-day period immediately prior to the applicable amortization date of the volume-weighted average price of our shares of common stock.                          
Volume-weighted average price, percentage                 85.00%       85.00%                  
Conversion price applicable period                 10 days       10 days                  
Acceleration payment of remaining face value, percentage 125.00%                                          
Adjusted conversion price of quoted market prices, Percentage 75.00%                                          
Common stock shares issued as payment in outstanding principal                   3,282,934                        
Principal amount outstanding                   8,608,694                        
Principal payment                 1,391,306                          
Common stock initial exercise price $ 4.32                                          
Common stock issued under warrant terms 434,027                       1,562,500                  
Period for anniversary, initial closing date Five-year period beginning on the six-month                                          
Warrant exercise price 4.32     3.60                                    
Registration statement filing period 6 months                                          
Period for registration statement to be effective 90 days thereafter                                          
Registration statement review period 120 days thereafter                                          
Debt instrument amortization payment description                         The conversion rate applicable to any amortization payment that we make in shares of our common stock will be the lower of (a) the Conversion Price and (b) a price equal to 85.0% of the average for a ten-day period immediately prior to the applicable amortization date of the volume-weighted average price of our shares of common stock.                  
Maximum percentage of cash flow effect on present value basis                           10.00%                
Percentage of carrying value of additional note to determine change in fair value of embedded conversion option                           10.00%                
Principal amount of loan, paid in cash                         1,739,130                  
Term of warrant 5 years 6 months                                          
Adjusted warrants exercise price 3.60                                          
Gross proceeds from derivative instrument 10,000,000                       8,000,000                  
Cost of the investor paid 45,000                       5,518                  
Direct financing cost 500,000                       400,000                  
Deferred cost 246,653                       317,201                  
Recorded expenses 253,347                       82,799                  
Interest expenses $ 271,606 $ 689,333