Investment in Affiliates (Details)
12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2014
Star Capital
USD ($)
Dec. 31, 2014
Star Capital
CNY
Dec. 31, 2013
Star Capital
USD ($)
Dec. 31, 2013
Star Capital
CNY
Dec. 31, 2011
Star Capital
USD ($)
Dec. 31, 2011
Star Capital
CNY
Dec. 31, 2014
Wuling Center
USD ($)
Dec. 31, 2014
Wuling Center
CNY
Dec. 31, 2013
Wuling Center
USD ($)
Dec. 31, 2013
Wuling Center
CNY
Dec. 31, 2012
Wuling Center
USD ($)
Dec. 31, 2012
Wuling Center
CNY
Jul. 31, 2012
Wuling Center
Dec. 31, 2014
Wuling Center
Xin Zhou
Dec. 31, 2014
Shengyuan Center
Dec. 31, 2014
Shouxin Center Shenquan Xenter
Aug. 31, 2014
Shouxin Center
USD ($)
item
Dec. 31, 2013
Shouxin Center
USD ($)
Dec. 31, 2013
Shouxin Center
CNY
Dec. 31, 2013
Muxin Center
USD ($)
Dec. 31, 2013
Muxin Center
CNY
Dec. 31, 2014
Hangzhou Kuyue
USD ($)
Dec. 31, 2014
Hangzhou Kuyue
CNY
Nov. 30, 2014
Hangzhou Kuyue
USD ($)
Nov. 30, 2014
Hangzhou Kuyue
CNY
Jan. 31, 2014
Hangzhou Kuyue
USD ($)
Jan. 31, 2014
Hangzhou Kuyue
CNY
Investment in affiliates                                                            
Investment made $ 8,890,449 $ 5,766,873 $ 2,161,001         $ 15,735,900 100,000,000 $ 2,946,996 18,000,000 $ 4,428,486 27,000,000 $ 2,386,440 15,000,000           $ 2,437,920 15,000,000 $ 4,085,625 25,000,000     $ 15,607,088 95,500,000 $ 4,085,625 25,000,000
Prepayment for investment 7,766,948 15,745,728                                             5,066,175 31,000,000        
Amount received as a return of capital       2,455,830 15,000,000 5,740,630 35,000,000                                              
Ownership interest held (as a percent)               3.80% 3.80% 6.50% 6.50% 6.50% 6.50% 6.50% 6.50%   4.90% 41.60% 28.00% 0.90% 13.00% 13.00% 23.40% 23.40%     79.00% 79.00% 21.00% 21.00%
Purchase price allocation                                                            
Percentage of vote of limited partners vote required to remove general partner without cause                               50.00%                            
Equity Method Investment, Realized Gain (Loss) on Disposal [Abstract]                                                            
Net proceeds from equity method investment after deducting commissions and related expenses                                       2,287,950                    
Ownership percentage disposed                                       12.20%                    
Equity interest held by third parties (as a percent)                                       4.80%                    
Equity interest held by employees (as percentage)                                       7.40%                    
Number of employees having equity method investment ownership interest                                       2                    
Gain (loss) recognized from disposal                                       $ 0