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Investment in Eton Pharmaceuticals, Inc. and Agreements - Related Party Transactions (Details Narrative) - Eton Pharmaceuticals, Inc. [Member] $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($) shares	Sep. 30, 2018 USD ($) shares
Number of shares owned | shares	3,500,000	3,500,000
Ownership percentage	27.00%	27.00%
Investment net loss	$ 1,032	$ 3,247
Carrying value of investment	$ 263	$ 263

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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 gain (loss) on sale or disposal of equity in securities of subsidiaries or equity method investee.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Number of shares issued which are neither cancelled nor held in the treasury.

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