Note 1 - Nature Of Operations (Details)	6 Months Ended
Jun. 30, 2018
Details
Entity Incorporation, State Country Name	Delaware
Entity Incorporation, Date of Incorporation	Jul. 29, 1994

State or Country Name where an entity is incorporated

No definition available.

Name:	dei_EntityIncorporationStateCountryName
Namespace Prefix:	dei_
Data Type:	xbrli:normalizedStringItemType
Balance Type:	na
Period Type:	duration