Investment in Hoth Therapeutics, Inc. (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair value	$ (3,467)	$ (1,977)
Hoth Therapeutics Inc [Member]
Shares Owned	1,636,230
Fair value per Share	$ 6.19
Fair value	$ 10,128

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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