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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule of Cash, cash equivalents, short-term investments and long-term investments      
Cash and cash equivalents $ 5,150,344 $ 1,573,328 $ 850,028
Short-term investments 5,474,013 4,470,574  
Subtotal 10,624,357 6,043,902  
Long-term investments 489,648  
Total 10,624,357 6,533,550  
Increase (Decrease) in cash and cash equivalents 3,577,016 $ 723,300  
Increase (Decrease) in short-term investments 1,003,439    
Increase (Decrease) in Subtotal 4,580,455    
Increase (Decrease) in long term investments (489,648)    
Increase (Decrease) in Total $ 4,090,807