Fair Value of Financial Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of fair value assets and liabilities

The following table presents the Company’s assets and liabilities that are measured at fair value at June 30, 2017 and December 31, 2016 ($ in thousands):

	Fair value measured at June 30, 2017
	Total carrying value at June 30,		Quoted prices in active markets		Significant other observable inputs		Significant unobservable inputs
	2017		(Level 1)		(Level 2)		(Level 3)
Assets
Marketable securities - corporate bonds and mutual funds	$	2,920	$	—	$	2,920	$	—
Investment in Hoth	$	675	$	—	$	—	$	675
Liabilities
Fair value of warrant liabilities	$	2,028	$	—	$	—	$	2,028

	Fair value measured at December 31, 2016
	Total carrying value at December 31,		Quoted prices in active markets		Significant other observable inputs		Significant unobservable inputs
	2016		(Level 1)		(Level 2)		(Level 3)
Assets
Marketable securities - corporate bonds	$	6,025	$	211	$	5,814	$	—
Liabilities
Fair value of warrant liabilities	$	702	$	—	$	—	$	702

Schedule of fair value assumptions

A summary of quantitative information with respect to the valuation methodology and significant unobservable inputs used for the Company’s warrant liabilities that are categorized within Level 3 of the fair value hierarchy at the date of issuance and as of June 30, 2017 is as follows:

Date of valuation	June 30, 2017		December 31, 2016
Risk-free interest rate		1.55%		1.93%
Expected volatility		100.00% - 135.18%		100% - 133.79%
Expected life (in years)		3.44 - 3.56		3.93 - 4.06
Expected dividend yield		—		—

Schedule of fair value of the company's level 3 financial liabilities

The following table sets forth a summary of the changes in the fair value of the Company’s Level 3 financial liabilities that are measured at fair value on a recurring basis as of June 30, 2017 and 2016 ($ in thousands):

	Fair Value of Level 3 financial liabilities
	June 30, 2017		June 30, 2016
Beginning balance	$	702	$	2,959
Fair value adjustment of warrant liabilities		1,326		(1,031	)
Ending balance	$	2,028	$	1,928