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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Tables)
6 Months Ended
Jun. 30, 2015
Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments [Abstract]  
Schedule of Cash, Cash Equivalents and Short-term Investments

 

  

As of

June 30,
2015

  

As of

December 31, 2014

  

Increase

(Decrease)

 
Cash and cash equivalents $1,925,179  $850,028  $1,075,151 
Short-term investments  1,984,000   2,489,000   (505,000)
Subtotal  3,909,179   3,339,028   570,151 
Long-term investments  0   496,000   (496,000)
Total $3,909,179  $3,835,028  $74,151