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Loans Payable - Additional Information (Detail)
 6 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 27 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended
Jun. 30, 2012
USD ($)
Dec. 31, 2011
USD ($)
Jun. 30, 2012
Erdos Metallurgy to Xi'an TCH
Jun. 30, 2012
Xi'an TCH to Erdos TCH
Jun. 30, 2012
Erdos TCH to Beijing Trust
Jun. 30, 2012
Beijing Trust to the holders of the category B trust units
Jun. 30, 2012
Erdos TCH
Jun. 30, 2012
Erdos TCH
Minimum
Jun. 30, 2012
Erdos TCH
Maximum
Jun. 30, 2012
Xi'an TCH
USD ($)
Jun. 30, 2012
Xi'an TCH
CNY
Dec. 31, 2011
Xi'an TCH
USD ($)
Dec. 31, 2011
Xi'an TCH
CNY
Dec. 16, 2011
Xi'an TCH
USD ($)
Dec. 16, 2011
Xi'an TCH
CNY
Jun. 28, 2011
Xi'an TCH
USD ($)
Jun. 28, 2011
Xi'an TCH
CNY
Jun. 30, 2012
Xi'an TCH
USD ($)
Jun. 30, 2011
Xi'an TCH
USD ($)
Jun. 30, 2012
Xi'an TCH
USD ($)
Jun. 30, 2012
Xi'an TCH
CNY
Jun. 30, 2011
Xi'an TCH
USD ($)
Mar. 31, 2012
Xi'an TCH
USD ($)
Year
Mar. 31, 2012
Xi'an TCH
CNY
Jun. 30, 2012
Xi'an TCH
Monthly payment
Jun. 28, 2011
Xi'an TCH
Set of 7MW steam turbine waste heat power generation system
MW
Jun. 28, 2011
Xi'an TCH
Furnaces and ancillary apparatus
Year
Apr. 06, 2010
Xi'an TCH
Loan One
USD ($)
Year
Apr. 06, 2010
Xi'an TCH
Loan One
CNY
Jun. 30, 2012
Xi'an TCH
Loan One
USD ($)
Mar. 30, 2011
Xi'an TCH
Debt Covenant
Apr. 06, 2010
Xi'an TCH
Debt Covenant
Mar. 30, 2011
Xi'an TCH
Debt Covenant
Minimum
USD ($)
Mar. 30, 2011
Xi'an TCH
Debt Covenant
Minimum
CNY
Apr. 06, 2010
Xi'an TCH
Debt Covenant
Minimum
USD ($)
Apr. 06, 2010
Xi'an TCH
Debt Covenant
Minimum
CNY
Jun. 30, 2012
Xi'an TCH
Loan Two
USD ($)
Year
Jun. 30, 2012
Xi'an TCH
Loan Two
CNY
Nov. 08, 2011
Xi'an TCH
Loan Three
USD ($)
Year
Nov. 08, 2011
Xi'an TCH
Loan Three
CNY
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
USD ($)
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
CNY
Dec. 03, 2011
Beijing Trust
Capital Trust Loan Agreement
CNY
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
Category A1 Preferred Trust Units
USD ($)
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category A1 Preferred Trust Units
Year
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category A2 Preferred Trust Units
Year
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category A2 Preferred Trust Units
Yearly
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category A3 Preferred Trust Units
Year
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category A3 Preferred Trust Units
Yearly
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category B secondary trust units
Year
Dec. 31, 2009
Beijing Trust
Capital Trust Loan Agreement
Category B secondary trust units
Yearly
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
Erdos TCH
Management
Category B1 secondary trust
USD ($)
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
Xi'an TCH
USD ($)
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
Xi'an TCH
CNY
Dec. 31, 2011
Beijing Trust
Capital Trust Loan Agreement
Xi'an TCH
USD ($)
Dec. 03, 2011
Beijing Trust
Capital Trust Loan Agreement
Xi'an TCH
CNY
Jun. 30, 2012
Beijing Trust
Capital Trust Loan Agreement
Xi'an TCH
Category B2 secondary trust
USD ($)
Debt Instrument [Line Items]                                                                                                                  
Debt instrument stated interest rate                                                 0.60133%                                       9.94%   11.00%   12.05%   8.35%            
Debt instrument maturity term                                                       3 3               3 3 4 4         2 3   4   4              
Stock unit issued                                                                                 $ 44,100,000 300,000,000,000,000   $ 235,600               $ 2,000,000         $ 6,800,000
Stock unit issued (in units)                                                                                       1,600,000               13,750,000         46,250,000
Repayment of trust loan                                                                                                         34,700,000 218,500,000.0 34,700,000 218,500,000.0  
Payment of bank loan                       3,970,000 25,000,000 7,940,000 50,000,000                             3,320,211             948,632           35,250,000                            
Management incentive benefit percentage of net profit               0.00% 100.00%                                                                                                
Incentive description             Erdos TCH must pay a management incentive benefit to Beijing Trust upon maturity of the category A3 and category B trust units in December 2013 if the ratio of Erdos TCH’s profit to its registered capital exceeds a base amount. If this criterion is met, the amount of the management incentive benefit is calculated based on a formula tied to Erdos TCH’s net profit and the average registered capital for the 2012 fiscal year. Under this formula the management incentive benefit could range between 0% and 100% of the net profit of Erdos TCH in the 2012 fiscal year.                                                                                                    
Benefits derived from clean development mechanism distribution     50.00% 50.00% 50.00% 70.00%                                                                                                      
Bank loans payable issued                         25,000,000                   4,743,158 30,000,000       4,743,158 30,000,000               4,743,158 30,000,000 20,553,685 130,000,000                                  
Debt instrument issuance date                                                       Apr. 06, 2010 Apr. 06, 2010                                                        
Debt instrument maturity date                                                       Apr. 06, 2013 Apr. 06, 2013                                                        
Rate as percentage of national base interest rate used to reset floating interest rate                                                       110.00% 110.00%               115.00% 115.00% 115.00% 115.00%                                  
Debt instrument, basis spread on variable rate                                                       7.32% 7.32%               7.65% 7.65% 7.94% 7.94%                                  
Minimum quarterly payment                                                       474,316 3,000,000               474,316 3,000,000 1,581,053 10,000,000                                  
Bank loans payable - current 14,387,580 6,983,129                                                       1,422,947             1,897,263                                        
Covenant description                                                             The loan has the following covenants (i) maintain the current assets and net assets not less than $79 million (RMB 500 million); (ii) assets to liability ratio not less than 80%; and (iii) the current ratio not less than 1. In the first quarter of 2011, the Company received a waiver letter from the Lender waiving all covenants. The loan has the following covenants (i) maintain the current assets and net assets at not less than $78 million (RMB 500 million); (ii) assets to liability ratio must not be less than 80%; and (iii) the current ratio must not be less than 2.5. The borrower was Xi'an TCH. On March 28, 2011, the Company received a waiver letter from the Lender waiving all covenants.                                                  
Current assets 53,445,866 46,368,376                                                             79,000,000 500,000,000 79,000,000 500,000,000                                          
Net assets                                                                 79,000,000 500,000,000 79,000,000 500,000,000                                          
Assets to liability ratio                                                                 80.00% 80.00% 80.00% 80.00%                                          
Current ratio                                                                 1 1 2.5 2.5                                          
Debt instrument maturity end date                                                                         Mar. 30, 2014 Mar. 30, 2014 Nov. 27, 2015 Nov. 27, 2015                                  
Proceed from bank term loan                                                                         4,743,158 30,000,000 20,553,685 130,000,000                                  
Bank loans payable - non current                                                                         1,897,263                                        
Debt instrument maturity term                                             1 1                                                                  
Proceed from bank term loan                                       4,743,158 30,000,000                                                                        
Interest payment frequency                                       Monthly Monthly                                                                        
Re-guarantee service fee                                       118,579 750,000                                                                        
Number of properties ownership transferred under sale leaseback transaction                                                   7 4                                                            
Sale Leaseback Transaction, Net Proceeds                               6,720,000 42,500,000                                                                                
Sales leaseback term Under sales-type leases, Xi'an TCH leased TRT systems to Zhangzhi with terms of five and 13 years, respectively; and leased CHPG systems to Tong Chuan, Shengwei, and Jin Yang Shengwei respectively for five years, BMPG systems to Pucheng for 15 years, BMPG systems to Shenqiu for 11 years, and a power and steam generating system from waste heat from metal refining to Erdos (five projects) for 20 years.                             Under the Agreement, Xi'an TCH transferred its ownership of a set of 7MW steam turbine waste heat power generation system (the "WHPG system currently used by Zhongbao") and four furnaces and ancillary apparatus (the "Assets") to Cinda Financial for $6.72 million (RMB 42.50 million), and Cinda Financial leased the Assets to Xi'an TCH for 5 years for $8.15 million (RMB 51.54 million) based upon the transfer cost and the benchmark interest rate for five year loans by People's Bank of China ("PBOC") (then 6.65%) plus 15% of that rate (7.6475%). The interest rate will increase if the five-year benchmark interest rate of PBOC increases but will remain the same if the benchmark rate decreases in the future. Xi'an TCH shall make pro rata quarterly payments to Cinda Financial for the leasing fees. Upon the completion of the leasing term and full payment of all leasing fees and other fees, Xi'an TCH can pay $672 (RMB 4,250) to acquire the ownership of the Assets from Cinda Financial. The quarterlyminimum leasing payment to Cinda Financial is $410,283 (RMB 2,594,998). Under the Agreement, Xi'an TCH transferred its ownership of a set of 7MW steam turbine waste heat power generation system (the "WHPG system currently used by Zhongbao") and four furnaces and ancillary apparatus (the "Assets") to Cinda Financial for $6.72 million (RMB 42.50 million), and Cinda Financial leased the Assets to Xi'an TCH for 5 years for $8.15 million (RMB 51.54 million) based upon the transfer cost and the benchmark interest rate for five year loans by People's Bank of China ("PBOC") (then 6.65%) plus 15% of that rate (7.6475%). The interest rate will increase if the five-year benchmark interest rate of PBOC increases but will remain the same if the benchmark rate decreases in the future. Xi'an TCH shall make pro rata quarterly payments to Cinda Financial for the leasing fees. Upon the completion of the leasing term and full payment of all leasing fees and other fees, Xi'an TCH can pay $672 (RMB 4,250) to acquire the ownership of the Assets from Cinda Financial. The quarterlyminimum leasing payment to Cinda Financial is $410,283 (RMB 2,594,998).                                                                                
Lease term                               5 years 5 years                                                                                
Present value of minimum lease payments for sale-leaseback 5,577,880                             8,150,000 51,540,000                                                                                
Final reacquisition amount to be paid under sale leaseback agreement                               672 4,250                                                                                
Sale Leaseback Transaction, Quarterly Rental Payments                               410,283 2,594,998                                                                                
One-time non-refundable leasing service charge                   401,265 2,550,000                                                                                            
Refundable security deposit                   334,388 2,125,000             334,388   334,388 2,125,000                                                                        
Prepaid leasing service fee amortization period                   5 years 5 years                                                                                            
Amortization of prepaid leasing service fee                                   20,215 0 40,429 255,000 0                                                                      
Prepaid loan fees - current 80,634 80,941               80,634 241,901             80,634   80,634 241,901                                                                        
Repayment                                       $ 1,640,325   $ 0