Note 3 - Option Agreement (Details Textual) $ / item in Millions	12 Months Ended
Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2012 USD ($)	Mar. 20, 2012 $ / item
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				5.00%
Noncontrolling Interest, Ownership Percentage by Parent	100.00%			96.00%
Increase In Shares Covered By Option				10.00%
Open Option Contracts Written, Exercise Price \| $ / item				1
Marketing Expense	$ 350,000	$ 242,000
Other Liabilities, Noncurrent	18,000	18,000
Option Expense [Member]
Marketing Expense			$ 18,000
Other Liabilities, Noncurrent	$ 18,000	$ 18,000

Increase in number of shares covered by the option in terms of percentage.

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- Definition

Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

The exercise price of the open option contracts written on the investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B.Column C)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611197-123010

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- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Details

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