Note 2 - Liquidity and Summary of Significant Accounting Principles - Adoption of ASU 2016-18 (Details) - USD ($)	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Net cash provided by investing activities	$ 2,000	$ 1,914
Previously Reported [Member]
Net cash provided by investing activities		5,409
Restatement Adjustment [Member] \| Accounting Standards Update 2014-09 [Member]
Net cash provided by investing activities		$ (3,495)

Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585

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