Note 5 - Deferred Compensation Plan (Details) - Activity of Non-vested Awards (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Director [Member]
Note 5 - Deferred Compensation Plan (Details) - Activity of Non-vested Awards [Line Items]
Granted	228.0	238.0
Granted (in Dollars per share)	$ 997	$ 894
Non-vested awards at period start	228.0	238.0
Non-vested awards at period start (in Dollars per share)	$ 997	$ 894
Key Employee [Member]
Note 5 - Deferred Compensation Plan (Details) - Activity of Non-vested Awards [Line Items]
Non-vested awards at period start	481.9	644.6
Granted	88.0	178.0
Forfeited		(24.6)
Non-vested awards at period start	569.9	798.0
Non-vested awards at period start (in Dollars per share)	$ 981	$ 869

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Share based payment award equity instruments other than options grants in period weighted average grant date fair value.

+ References

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- Definition

Share based payment award equity instruments other than options nonvested weighted average grant date fair value.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting 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 (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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 (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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