Fair Value Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table classifies the Company’s financial assets and liabilities measured at fair value on a recurring basis at March 31, 2018 and December 31, 2017, respectively:

	Balance at March 31, 2018
	Level 1		Level 2		Level 3		Total
Asset included in:
Cash and cash equivalents
Money market securities	$	17,470,074	$	—	$	—	$	17,470,074
Investments available-for-sale at fair value
U.S. government obligations	$	9,943,245	$	—	$	—	$	9,943,245
Corporate debt securities	$	—	$	15,181,964	$	—	$	15,181,964
Total	$	27,413,319	$	15,181,964	$	—	$	42,595,283
	Balance at December 31, 2017
	Level 1		Level 2		Level 3		Total
Asset included in:
Cash and cash equivalents
Money market securities	$	8,521,054	$	—	$	—	$	8,521,054
Total	$	8,521,054	$	—	$	—	$	8,521,054