Cash, Cash Equivalents and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2014

Investments in Money Market Funds and Marketable Securities

Investments in money market funds and marketable securities consisted of the following at March 31, 2014:

	March 31, 2014
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Marketable securities:
U.S. Government and agency securities	$	9,529,909	$	2,415	$	(120	)	$	9,532,204
Corporate and other debt securities		12,016,880		4,043		(1,729	)		12,019,194
		21,546,789		6,458		(1,849	)		21,551,398
Long-term marketable securities:
U.S. Government and agency securities		8,918,120		516		(8,279	)		8,910,357
Corporate and other debt securities		1,994,104		1,915		(1,858	)		1,994,161
		10,912,224		2,431		(10,137	)		10,904,518
Total	$	32,459,013	$	8,889	$	(11,986	)	$	32,455,916

Investments in money market funds and marketable securities consisted of the following at December 31, 2013:

	December 31, 2013
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Marketable securities:
U.S. Government and agency securities	$	8,165,464	$	435	$	(630	)	$	8,165,269
Corporate and other debt securities		13,626,690		3,636		(2,045	)		13,628,281
		21,792,154		4,071		(2,675	)		21,793,550
Long-term marketable securities:
U.S. Government and agency securities		11,599,415		466		(7,034	)		11,592,847
Corporate and other debt securities		625,882		100		(227	)		625,755
		12,225,297		566		(7,261	)		12,218,602
Total	$	34,017,451	$	4,637	$	(9,936	)	$	34,012,152

Contractual Maturities of Money Market Funds and Marketable Securities

The contractual maturities of money market funds and marketable securities at March 31, 2014 were as follows:

	Amortized Cost		Fair Value
Due in 1 year or less	$	21,546,789	$	21,551,398
Due in 1 to 2 years		10,912,224		10,904,518
	$	32,459,013	$	32,455,916