Short Term Investments (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Investments [Abstract]

Amortized cost and fair value of short term investments

The amortized cost and fair value of short term investments as of December 31, 2015 were as follows:

		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate debt securities	$	1,401,904	$	—	$	(451)	$	1,401,453
Commercial paper		249,888		—		—		249,888
Total marketable securities	$	1,651,792	$	—	$	(451)	$	1,651,341

Amortized cost and fair value of short term investments by contractual maturity

As of December 31, 2015, the amortized cost and fair value of short term investments by contractual maturity were as follows:

	Amortized Cost		Fair Value
Due in 1 year or less	$	1,651,792	$	1,651,341
Total marketable securities	$	1,651,792	$	1,651,341