Note 23 - Stock-based Compensation (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Stock Based Compensation [Line Items]
Options exercised	0	0
Stock Options [Member]
Stock Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	7 years
Allocated Share-based Compensation Expense	$ 5,000,000	$ 4,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 500,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 1.73	$ 2.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 7,000,000	$ 5,000,000
Restricted Stock Units (RSUs) [Member]
Stock Based Compensation [Line Items]
Weighted average grant date fair value	$ 2.93	$ 3.66
Fair value of restricted stock units vested	$ 2,000,000	$ 3,000,000
Omnibus Incentive Plan 2013 [Member]
Stock Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	5,800,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Cash Payment Per Employee	$ 2,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Fair Value of Awards Per Non-Employee Director	$ 900,000
Omnibus Incentive Plan 2013 [Member] \| Stock Options [Member] \| Maximum [Member]
Stock Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	2,000,000
Omnibus Incentive Plan 2013 [Member] \| Stock Options and Stock Appreciation Rights [Member]
Stock Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in Shares)	2,500,000
Omnibus Incentive Plan 2013 [Member] \| Performance Shares [Member]
Stock Based Compensation [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in Shares)	1,000,000
Omnibus Incentive Plan 2013 [Member] \| Unvested Restricted Stock Awards [Member]
Stock Based Compensation [Line Items]
Allocated Share-based Compensation Expense	$ 2,000,000	$ 2,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 3 months 18 days

Refers to information regarding the maximum cash payment per employee in the share-based compensation arrangements.

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Refers to information regarding the maximum fair value of awards per non-employee director under the share-based compensation plan arrangements.

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Stock based compensation.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Number of share options (or share units) exercised during the current period.

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