Note 4 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
Dec. 31, 2017
Percentage Of Income Tax Examination Likelihood Of Tax Benefits Being Realized Upon Settlement	50.00%
Preferred Stock, Dividend Rate, Percentage	10.00%
Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration