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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The cash outflow associated with the purchase of or advances to an 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 units that have been purchased during the period, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes.

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Amount of cash paid to purchase products.

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Note 4 - Investment in Limited Liability Company (Details Textual)		3 Months Ended	6 Months Ended
	Aug. 08, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Income (Loss) from Equity Method Investments, Total			$ (407,000)
InControl Medical [Member]
Equity Method Investment, Ownership Percentage		11.00%	11.00%
Income (Loss) from Equity Method Investments, Total		$ 158,000	$ 407,000
InControl Medical [Member] \| Distribution Agreement [Member]
Unrecorded Unconditional Purchase Obligation, Period Quantity Purchased			2,700
Payments for Purchase of Products		$ 63,000	$ 143,000
InControl Medical [Member] \| Membership Unit Subscription Agreement [Member]
Payments to Acquire Equity Method Investments	$ 2,500,000		$ 2,500,000