Note 10 - Going Concern (Details Textual)	3 Months Ended
Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Net Cash Provided by (Used in) Operating Activities, Total	$ (262,000)	$ (933,000)
Retained Earnings (Accumulated Deficit), Ending Balance	$ (16,801,000)		$ (15,854,000)
Number of Major Customers	1
Number of Vendors	1
Supplier Concentration Risk [Member] \| Cost of Goods, Product Line [Member]
Concentration Risk, Percentage	52.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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