Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of the Company’s Assets and Liabilities that are Measured and Recognized at Fair Value on a Recurring Basis Classified Under the Appropriate Level of the Fair Value Hierarchy

The following table presents the Company’s assets and liabilities that are measured and recognized at fair value on a recurring basis classified under the appropriate level of the fair value hierarchy as of June 30, 2019 and December 31, 2018:

	Fair Value Measurements at June 30, 2019
	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market fund (1)	$	10,742,715	$	—	$	—	$	10,742,715
Total Assets	$	10,742,715	$	—	$	—	$	10,742,715
Liabilities:
Derivative financial instruments—warrants	$	—	$	—	$	18,287	$	18,287
Total Liabilities	$	—	$	—	$	18,287	$	18,287

	Fair Value Measurements at December 31, 2018
	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Money market fund (1)	$	11,392,093	$	—	$	—	$	11,392,093
Total Assets	$	11,392,093	$	—	$	—	$	11,392,093
Liabilities:
Derivative financial instruments—warrants	$	—	$	—	$	32,315	$	32,315
Total Liabilities	$	—	$	—	$	32,315	$	32,315

(1) Included as a component of cash and cash equivalents on the accompanying condensed balance sheets.

Schedule of Changes in the Fair Value of the Company’s Level 3 Liabilities

The following table sets forth a summary of changes in the fair value of the Company’s Level 3 liabilities for the six months ended June 30, 2019:

Description	Balance at December 31, 2018		Realized (gains) or losses			Balance at June 30, 2019
Derivative financial instruments—warrants	$	32,315	$	(14,028	)	$	18,287