Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding (USD $)	12 Months Ended
Dec. 31, 2014
SARS 1
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of exercise price	$ 4.90
SARS (in Shares)	33,184
Weighted average remaining contractual life (years)	29 days
Weighted average exercise price	$ 4.90
SARS 2 \| Minimum [Member]
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of exercise price	$ 5.62
SARS 2 \| Maximum [Member]
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of exercise price	$ 7.36
SARS 2
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
SARS (in Shares)	488,840
Weighted average remaining contractual life (years)	2 years 178 days
Weighted average exercise price	$ 6.26
SARS 3 \| Minimum [Member]
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of exercise price	$ 4.90
SARS 3 \| Maximum [Member]
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
Range of exercise price	$ 7.36
SARS 3
Note 12 - Share-based Compensation (Details) - Summary of Information About Stock Appreciation Rights Outstanding [Line Items]
SARS (in Shares)	522,024
Weighted average remaining contractual life (years)	2 years 124 days
Weighted average exercise price	$ 6.17

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The weighted average exercise price for non-option equity instruments.

+ References

No definition available.

+ Details

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

+ Details

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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)(i)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(ii)

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

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