Fair Value Instruments (Tables)

6 Months Ended

Jun. 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 June 30, 2018 and December 31, 2017, respectively:

	Balance at June 30, 2018
	Level 1		Level 2			Level 3		Total
Asset included in:
Cash and cash equivalents
Money market securities	$	5,525,432	$	—		$	—	$	5,525,432
Investments available-for-sale at fair value
U.S. government obligations	$	11,989,585	$	—		$	—	$	11,989,585
Corporate debt securities	$	—	$	22,966,351		$	—	$	22,966,351
Total	$	17,515,017	$	22,966,351		$	—	$	40,481,368
	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