Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions Utilized for Stock Option Grants	9 Months Ended
Sep. 30, 2015 $ / shares
Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions Utilized for Stock Option Grants [Line Items]
Volatility	48.59%
Expected life (years)	6 years
Risk-free interest rate	2.01%
Minimum [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions Utilized for Stock Option Grants [Line Items]
Fair value	$ 19.30
Maximum [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions Utilized for Stock Option Grants [Line Items]
Fair value	$ 19.37

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(ii)

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

-Paragraph 2

-Subparagraph (d)(1)

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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