Fair Value Instruments (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2018 and December 31, 2017, respectively:

	Balance at September 30, 2018
	Level 1		Level 2		Level 3		Total
Asset included in:
Cash and cash equivalents
Money market securities	$	6,105,380	$	—	$	—	$	6,105,380
Investments available-for-sale at fair value
U.S. government obligations		9,995,100		—		—		9,995,100
Corporate debt securities		—		17,617,931		—		17,617,931
Total	$	16,100,480	$	17,617,931	$	—	$	33,718,411
	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