Note 10 - Preferred Stock (Details Textual) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Preferred Stock, Shares Outstanding, Ending Balance	3,187	4,250
Series A Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance	3,187
Series A Preferred Stock [Member] \| Accrued Liabilities Current [Member]
Dividends Payable, Current	$ 79,675

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765

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