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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 |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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