Cash, Cash Equivalents and Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2018

Cash Cash Equivalents And Available For Sale Securities [Abstract]

Summary of Investments Included in Cash Equivalents and Short Term Investments

The following table summarizes the Company’s investments, which are included in cash equivalents and short-term investments, as of March 31, 2018 and December 31, 2017:

March 31, 2018	Amortized Cost		Unrealized Gains		Unrealized Loss			Fair Value
Cash equivalents and short-term investments
Money market funds	$	28,831,110	$	—	$	—		$	28,831,110
Asset-backed securities		8,099,245		—		(8,721	)		8,090,524
Commercial paper		32,277,246		—		—			32,277,246
Corporate debt securities		21,433,498		—		(53,474	)		21,380,024
U.S. Treasury securities		24,916,290		—		(23,970	)		24,892,320
Total	$	115,557,389	$	—	$	(86,165	)	$	115,471,224
December 31, 2017	Amortized Cost		Unrealized Gains		Unrealized Loss			Fair Value
Cash equivalents and short-term investments
Money market funds	$	44,181,756	$	—	$	—		$	44,181,756
Asset-backed securities		7,428,021		—		(6,318	)		7,421,703
Commercial paper		34,882,298		—		—			34,882,298
Corporate debt securities		26,905,815		—		(49,532	)		26,856,283
U.S. Treasury securities		8,940,778		—		(17,458	)		8,923,320
Total	$	122,338,668	$	—	$	(73,308	)	$	122,265,360