Note 4 - Investment in Limited Liability Company (Details Textual) - USD ($)		9 Months Ended
Aug. 08, 2017	Sep. 30, 2017	Sep. 30, 2016
Payments to Acquire Equity Method Investments		$ 2,500,000
InControl Medical [Member] \| Membership Unit Subscription Agreement [Member]
Payments to Acquire Equity Method Investments	$ 2,500,000

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration