Note 15 - Stock Based Compensation (Details) - Options Outstanding (USD $)	12 Months Ended
Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in Shares)	1,494,399
Options outstanding, weighted-average exercise price	$ 3.59
Options exercisable (in Shares)	454,761
Options exercisable, weighted-average exercise price	$ 5.06
Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit	$ 1.39
Upper range limit	$ 2.95
Options outstanding (in Shares)	635,125
Options outstanding, weighted-average remaining contractual life	7 years 255 days
Options outstanding, weighted-average exercise price	$ 2.33
Options exercisable (in Shares)	129,637
Options exercisable, weighted-average exercise price	$ 2.33
Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit	$ 3.14
Upper range limit	$ 5.12
Options outstanding (in Shares)	665,150
Options outstanding, weighted-average remaining contractual life	7 years 219 days
Options outstanding, weighted-average exercise price	$ 3.71
Options exercisable (in Shares)	131,000
Options exercisable, weighted-average exercise price	$ 4.43
Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit	$ 5.70
Upper range limit	$ 8.00
Options outstanding (in Shares)	170,350
Options outstanding, weighted-average remaining contractual life	3 years 328 days
Options outstanding, weighted-average exercise price	$ 6.74
Options exercisable (in Shares)	170,350
Options exercisable, weighted-average exercise price	$ 6.74
Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower range limit	$ 9.93
Upper range limit	$ 12.13
Options outstanding (in Shares)	23,774
Options outstanding, weighted-average remaining contractual life	1 year 109 days
Options outstanding, weighted-average exercise price	$ 11.36
Options exercisable (in Shares)	23,774
Options exercisable, weighted-average exercise price	$ 11.36

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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)(iii)

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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