4. Short Term Investments

6 Months Ended

Jun. 30, 2015

Investments, All Other Investments [Abstract]

4. Short Term Investments

The amortized cost and fair value of short term investments as of June 30, 2015 were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate debt securities	$	2,957,818	$	—	$	(1,390	)	$	2,956,428

The amortized cost and fair value of short term investments as of December 31, 2014 were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate debt securities	$	6,806,150	$	—	$	(6,448	)	$	6,799,702
Commercial paper	599,934		—			—		599,934
Total marketable securities	$	7,406,084	$	—	$	(6,448	)	$	7,399,636

As of June 30, 2015, there are no short term investments, classified and accounted for as available-for-sale securities that have been in a continuous unrealized loss position in excess of twelve months.

As of June 30, 2015, all of the Company’s short term investments had maturity dates due within 1 year or less.