Fair Value of Financial Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

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 December 31, 2018 and 2017 ($ in thousands):

	Fair value measured at December 31, 2018
			Quoted prices in		Significant other		Significant
	Total at December 31,		active markets		observable inputs		unobservable inputs
	2018		(Level 1)		(Level 2)		(Level 3)
Assets
Marketable securities - exchange traded funds	$	2,700	$	2,700	$	—	$	—
Investments at Hoth	$	9,214	$	—	$	—	$	9,214
Investments at DatChat	$	1,000	$	—	$	—	$	1,000
Other investments	$	131	$	—	$	—	$	131
Liabilities
Fair value of warrant liabilities	$	82	$	—	$	—	$	82

	Fair value measured at December 31, 2017
	Total carrying value at December 31,		Quoted prices in active markets		Significant other observable inputs		Significant unobservable inputs
	2017		(Level 1)		(Level 2)		(Level 3)
Assets
Marketable securities - mutual and exchange traded funds	$	3,998	$	976	$	3022	$	—
Investments at Hoth	$	1,020	$	—	$	—	$	1,020
Liabilities
Fair value of warrant liabilities	$	822	$	—	$	—	$	822

Schedule of fair value of the Company's Level 3 financial assets

The following table sets forth a summary of the changes in the fair value of the Company’s Level 3 financial assets that are measured at fair value on a recurring basis:

	Fair Value of Level 3 investment
	December 31,		December 31,
	2018		2017
Beginning balance	$	1,020	$	—
Purchase of other investments at fair value		131		—
Purchase of investment in DatChat at fair value		1,000		—
Fair value of Hoth upon issuance		—		675
Change in fair value of Hoth		8,194		345
Ending balance	$	10,345	$	1,020

Schedule of hierarchy for nonfinancial assets measured at fair value on a non-recurring basis

The following tables presents the Company’s hierarchy for nonfinancial assets measured at fair value on a non-recurring basis (in thousands):

			Impairment Charges -
	Net Carrying Value at		Year Ended December
	December 31, 2018		31, 2018
Assets
Patent Portfolios, Net	$	—	$	2,173

			Impairment Charges -
	Net Carrying Value at		Year Ended December
	December 31, 2017		31, 2017
Assets
Patent Portfolios, Net	$	3,578	$	—

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 December 31, 2018 and December 31, 2017 is as follows: 

Date of valuation	December 31, 2018	December 31, 2017
Risk-free interest rate	2.48%	1.98%
Expected volatility	72.03% - 103.13%	100.00% - 132.21%
Contractual life (in years)	1.94-2.06	2.94 - 3.06
Expected dividend yield	—	—

A summary of quantitative information with respect to the valuation methodology and significant unobservable inputs used for the Company’s valuation in Hoth that are categorized within Level 3 of the fair value hierarchy at the date of issuance and as of December 31, 2018 and 2017 is as follows:

Date of valuation	December 31, 2018			December 31, 2017
Risk-free interest rate		2.45	%		1.83	%
Expected volatility		75.00	%		75.00	%
Contractual life (in years)		0.17			1.50

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 for the year ended December 31, 2018 and 2017 ($ in thousands): 

	Fair Value of Level 3 financial liabilities
	December 31, 2018			December 31, 2017
Beginning balance	$	822		$	702
Fair value adjustment of warrant liabilities		(740	)		120
Ending balance	$	82		$	822