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Summary of Principal Accounting Policies - Additional Information (Detail)
 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2012
Tianjin Gefei Asset Management Co., Ltd
Investment
Dec. 31, 2011
Tianjin Gefei Asset Management Co., Ltd
Investment
Dec. 31, 2010
Tianjin Gefei Asset Management Co., Ltd
Investment
Dec. 31, 2012
Variable Interest Entity, Primary Beneficiary
USD ($)
Dec. 31, 2012
Wuhu Gefeiyintai Investment Management Co., Ltd
Investment
Dec. 31, 2012
Wuhu Gefeiyintai Investment Management Co., Ltd
Newly Established
Investment
Dec. 31, 2012
Sales Revenue Net
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2011
Sales Revenue Net
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2010
Sales Revenue Net
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2012
Net Income
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2011
Net Income
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2010
Net Income
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2012
Assets, Total
Variable Interest Entity, Primary Beneficiary
Dec. 31, 2011
Assets, Total
Variable Interest Entity, Primary Beneficiary
May 31, 2011
Kunshan Jingzhao Equity Investment Management Co., Ltd
USD ($)
May 31, 2011
Kunshan Jingzhao Equity Investment Management Co., Ltd
CNY
Nov. 30, 2012
Kunshan Vantone Zhengyuan Private Equity Fund Management Co., Ltd
USD ($)
Nov. 30, 2012
Kunshan Vantone Zhengyuan Private Equity Fund Management Co., Ltd
CNY
Dec. 31, 2012
Minimum
Dec. 31, 2012
Minimum
Tianjin Gefei Asset Management Co., Ltd
Dec. 31, 2012
Minimum
CHINA
Dec. 31, 2012
Maximum
Dec. 31, 2012
Maximum
Tianjin Gefei Asset Management Co., Ltd
Dec. 31, 2012
Maximum
Wuhu Gefeiyintai Investment Management Co., Ltd
Dec. 31, 2012
Maximum
CHINA
Significant Accounting Policies [Line Items]                                                          
Interest-free loans extended to VIE founders $ 3,600,000     27,000,000                                                  
Concentration risk, percentage                     8.30% 3.30% 11.00% 4.70% (4.30%) 12.00% 18.70% 7.80%                      
Ownership percentage in affiliate to represent influence                                             20.00%            
Number of private equity funds the company invested         3 3 4                                            
Equity Interest ownership                                     40.00% 40.00% 15.00% 15.00%   1.00%     5.00% 2.00%  
Number of real estate funds the company invested                 1 38                                      
Capital Injected in to a joint venture                                     600,000 4,000,000 600,000 3,800,000              
Loss from equity in affiliates 617,361 (21,347) (25,137)                                                    
Investments in affiliates 6,055,343 2,434,689           6,055,204                                          
Capitalized software development costs, amortization period                                             2 years     4 years      
Fair value of Long term investments 3,096,898 2,030,044                                                      
Multiple element arrangements, revenue allocation If the estimated selling price for recurring services increased (or decreased) by 1%, the revenue allocated to this revenue element would increase (decrease) by 0.1% to 0.7%.                                                        
Business tax and related surcharges                                                 5.35%       5.65%
Cash subsidies $ 4,295,029 $ 562,333 $ 172,737