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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Tables)
 12 Months Ended
Dec. 31, 2015
Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments [Abstract]  
Schedule of cash, cash equivalents and short-term investments and long-term investments

  As of December 31,  

Increase

(Decrease)

 
  2015  2014    
Cash and cash equivalents $1,573,328  $850,028  $723,300 
Short-term investments  4,464,000   2,489,000   1,975,000 
   Subtotal  6,037,328   3,339,028   2,698,300 
Long-term investments  487,000   496,000   (9,000)
   Total $6,524,328  $3,835,028  $2,689,300