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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Tables)
3 Months Ended
Mar. 31, 2015
Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments [Abstract]  
Schedule of Cash, Cash Equivalents and Short-term Investments

  As of 
March 31, 2015
  As of 
December 31, 2014
  Increase 
(Decrease)
 
Cash and cash equivalents $2,470,088  $850,028  $1,620,060 
Short-term investments  1,740,000   2,489,000   (749,000)
Subtotal  4,210,088   3,339,028   871,060 
Long-term investments  0   496,000   (496,000)
Total $4,210,088  $3,835,028  $375,060