Investments (Tables)

6 Months Ended

Jun. 30, 2016

Investments

Schedule of cash, cash equivalents and investments

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2015
Cash and cash equivalents:
Cash and money market accounts	$	15,302,382		—		—	$	15,302,382
Total cash and cash equivalents	$	15,302,382	$	—	$	—	$	15,302,382
Short-term investments:
Corporate bonds	$	3,108,516		—	$	(1,069)	$	3,107,447
Commercial paper		1,999,082		98		—		1,999,180
Total short-term investments	$	5,107,598	$	98	$	(1,069)	$	5,106,627
Total cash, cash equivalents, and investments	$	20,409,980	$	98	$	(1,069)	$	20,409,009
June 30, 2016
Cash and cash equivalents:
Cash and money market accounts	$	8,675,724		—		—	$	8,675,724
Total cash and cash equivalents	$	8,675,724	$	—	$	—	$	8,675,724