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Mortgage and Loans Payable - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Coins
oz
Jul. 31, 2013
May 10, 2012
Sep. 30, 2013
First Mortgage [Member]
Nov. 30, 2011
Senior Convertible Note [Member]
Investor
Sep. 30, 2013
Senior Convertible Note [Member]
May 10, 2012
Senior Convertible Note [Member]
Sep. 30, 2013
Senior Convertible Note [Member]
Lender [Member]
Sep. 30, 2013
Additional Note [Member]
Jan. 02, 2013
Additional Note [Member]
May 10, 2012
Additional Note [Member]
May 31, 2009
Mortgage Payable [Member]
May 31, 2008
Mortgage Payable [Member]
Sep. 30, 2013
Mortgage Payable [Member]
Jun. 30, 2013
Mortgage Payable [Member]
Jul. 11, 2008
Mortgage Payable [Member]
May 31, 2008
Mortgage Payable [Member]
First Mortgage [Member]
May 01, 2009
Mortgage Payable [Member]
Second Mortgage [Member]
Mar. 30, 2012
Term Loan [Member]
Sep. 30, 2013
Term Loan [Member]
May 04, 2011
Term Loan [Member]
Sep. 30, 2013
Term Loan Amendment [Member]
Sep. 30, 2013
Project Term Loan [Member]
Jul. 31, 2012
Project Term Loan [Member]
Debt Instrument [Line Items]                                                  
Company's consolidated debt $ 1,280,500 $ 1,280,500     $ 573,953                     $ 1,302,000 $ 2,580,000     $ 5,000,000   $ 5,000,000   $ 10,000,000 $ 10,000,000
Term loan principal reduction                                           2,000,000      
Basis spread on variable rate, points     0.75%                       1.00%   0.75%     5.00% 1.00% 5.00% 5.00% 5.00%  
Debt instrument description                                       one month LIBOR rate plus 500 basis points one month LIBOR rate plus 500 basis points   one month LIBOR rate plus 500 basis points One month LIBOR rate plus 500 basis points  
Commitment fee                                           250,000      
Maturity date                           May 14, 2015 Jul. 11, 2013           Apr. 23, 2012   Jul. 31, 2016 Jul. 24, 2013  
Loan-to-value, percent   80.00%                                              
Periodic payment                           5,080                 500,000    
Secured collateral   25,000                                              
Value of secured collateral, percent   40.00%                                              
Loan origination fee paid at closing                                               50,000  
Restricted cash deposit for interest payments over the term of loan 500,000 500,000                                           500,000  
Project term loan collateral value 15,000,000 15,000,000                                              
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 outstanding                                   679,000 100,000            
Interest rate, stated percentage                       9.00%   6.45%                      
Outstanding principal amount mortgage loan                         25,000                        
Percentage of variable interest                           1.00%                      
Original principal amount     10,000,000 8,000,000   10,000,000           8,000,000                          
Warrant issued to purchase common stock 1,302,083 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   $ 3.74 $ 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             2,976,583                                    
Principal amount outstanding             7,826,086                                    
Principal payment             2,173,914     4,086,957                              
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 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%                            
Term of warrant   5 years 6 months                                              
Adjusted warrants exercise price 3.60 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 $ 505,646 $ 1,801,479