Marketable Securities (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Aggregate Fair Value	$ 10,523,821	$ 10,900,722
Cost or Amortized Cost	10,520,553	10,902,130
Net Unrealized Gains (Losses)	3,268	(1,408)
Government securities
Schedule of Available-for-sale Securities [Line Items]
Aggregate Fair Value	7,024,178	6,740,825
Cost or Amortized Cost	7,019,981	6,741,466
Net Unrealized Gains (Losses)	4,197	(641)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Aggregate Fair Value	3,499,643	4,159,897
Cost or Amortized Cost	3,500,572	4,160,664
Net Unrealized Gains (Losses)	$ (929)	$ (767)