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Investments (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Summary of investments

The following is a summary of short-term investments as of December 31, 2014 and 2013:

			As of December 31, 2014
	Contractual Maturity (in years)		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Market Value
Mutual funds	---		$	29,487,758			$	2,667			$	(216,790	)		$	29,273,635
US corporate debt securities	Less than 2		23,839,606				70				(37,337		)		23,802,339
Total investments			$	53,327,364			$	2,737			$	(254,127	)		$	53,075,974

			As of December 31, 2013
	Contractual Maturity (in years)		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Market Value
Mutual funds	---		$	18,178,518			$	—			$	(78,614	)		$	18,099,904
Municipal bonds	Less than 1		805,144				560				—				805,704
Total investments			$	18,983,662			$	560			$	(78,614	)		$	18,905,608

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

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