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Note 14 - Subsequent Events (Details Textual) - Director [Member] - shares	Nov. 12, 2018	Nov. 08, 2018	Aug. 14, 2018	May 14, 2018	May 10, 2018	Mar. 28, 2018	Mar. 23, 2018
Stock Issued During Period, Shares, Issued for Services			4,161	648	2,035	762	7,659
Subsequent Event [Member]
Stock Issued During Period, Shares, Issued for Services	910	4,800

X

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: