The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Long-Term Investments (Equity-Method Investments) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 09, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 14,531		$ 14,531		$ 11,631
Proceeds from long-term equity method investment				1,495	$ 1,231
Equity in (losses) earnings from investments		(468)	$ 3,230	(791)	$ 9,205
Indian Creek Investors LP (“Indian Creek”)
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 665		$ 665		1,167
Equity-method ownership percentage		12.47%		12.47%
Boyar Value Fund (“Boyar”)
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 9,362		$ 9,362		8,384
Equity-method ownership percentage		35.65%		35.65%
Quoted market value		$ 9,362		$ 9,362
Optika Fund LLC (“Optika”)
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 4,504		$ 4,504		0
Equity-method ownership percentage		10.76%		10.76%
Contributions to equity method investments		$ 5,000
Ladenburg Thalmann Financial Services Inc. (“LTS”)
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 0		$ 0		2,080
Equity-method ownership percentage		10.22%		10.22%
Quoted market value		$ 36,003		$ 36,003
Castle Brands, Inc. (“Castle”)
Schedule of Equity Method Investments [Line Items]
Equity-method investments		$ 0		$ 0		$ 0
Equity-method ownership percentage		7.62%		7.62%
Quoted market value		$ 16,248		$ 16,248
Subsequent Event \| Castle Brands, Inc. (“Castle”)
Schedule of Equity Method Investments [Line Items]
Sale of stock (in dollars per share)	$ 1.27
Sale of stock (in shares)	12,895,017
Proceeds from sale	$ 16,377