Note 12 - Stock Based Compensation (Details) - Stock Option and Restricted Stock Awards (USD $)	9 Months Ended
Sep. 30, 2014
Note 12 - Stock Based Compensation (Details) - Stock Option and Restricted Stock Awards [Line Items]
Equity awards outstanding at December 31, 2013	861,905
Equity awards outstanding at December 31, 2013	$ 12.30
Equity awards granted	954,200
Equity awards granted	$ 3.54
Equity awards forfeited, cancelled or expired	(67,925)
Equity awards forfeited, cancelled or expired	$ 20.15
Equity awards outstanding at September 30, 2014	1,748,180
Equity awards outstanding at September 30, 2014	$ 7.21
Equity awards outstanding at September 30, 2014	8 years 7 days
Equity awards exercisable at September 30, 2014	1,008,573
Equity awards exercisable at September 30, 2014	$ 9.59
Equity awards exercisable at September 30, 2014	6 years 262 days
Restricted Stock [Member]
Note 12 - Stock Based Compensation (Details) - Stock Option and Restricted Stock Awards [Line Items]
Equity awards outstanding at December 31, 2013	2,109
Equity awards outstanding at December 31, 2013	$ 16.28
Equity awards granted	25,250
Equity awards granted	$ 3.49
Equity awards exercised	(20,841)
Equity awards exercised	$ 4.82
Equity awards outstanding at September 30, 2014	6,518
Equity awards outstanding at September 30, 2014	$ 3.38
Aggregate intrinsic value of outstanding awards at September 30, 2014	$ 22,025

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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No definition available.

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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).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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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.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Number of non-option equity instruments exercised by participants.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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