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Note 15 - Share-Based and Other Compensation Plans (Non-Qualified Stock Options - Range of Exercise Prices) (Details) - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Number Outstanding | 2,692,457 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 4 years 3 months 1 day |  |
Options Exercisable, Number Exercisable | 1,435,232 |  |
$2.45 - $3.58 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Range of Exercise Prices, Lower Range Limit | $ 2.45 |  |
Range of Exercise Prices, Upper Range Limit | $ 3.58 |  |
$2.45 - $3.58 [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Number Outstanding | 1,718,010 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 5 years 2 months 6 days |  |
Options Outstanding, Weighted Average Exercise Price | $ 2.8 |  |
Options Exercisable, Number Exercisable | 1,153,515 |  |
Options Exercisable, Weighted Average Exercise Price | $ 2.98 |  |
$5.76 - $7.06 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Range of Exercise Prices, Lower Range Limit | 5.76 |  |
Range of Exercise Prices, Upper Range Limit | $ 7.06 |  |
$5.76 - $7.06 [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Number Outstanding | 47,967 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 2 years 2 months 6 days |  |
Options Outstanding, Weighted Average Exercise Price | $ 6.92 |  |
Options Exercisable, Number Exercisable | 47,967 |  |
Options Exercisable, Weighted Average Exercise Price | $ 6.92 |  |
$10.42 - $15.44 [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Range of Exercise Prices, Lower Range Limit | 10.42 |  |
Range of Exercise Prices, Upper Range Limit | $ 15.44 |  |
$10.42 - $15.44 [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Number Outstanding | 718,790 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 1 month 10 days |  |
Options Outstanding, Weighted Average Exercise Price | $ 13.53 |  |
Options Exercisable, Number Exercisable | 225,580 |  |
Options Exercisable, Weighted Average Exercise Price | $ 10.91 |  |
Equity Compensation Plan, 1995 and 2008 [Member] | Exercise Price Range, Four [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Options Outstanding, Number Outstanding | 207,690 |  |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 3 years 7 days |  |
Options Outstanding, Weighted Average Exercise Price | $ 18.42 |  |
Options Exercisable, Number Exercisable | 8,170 |  |
Options Exercisable, Weighted Average Exercise Price | $ 18.42 |  |
2013 Award Year [Member] | Minimum [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options Granted in Period, Percent of Increase Over Granted Price for Additional Vesting Criteria |  | 125.00% |
2012 Award Year [Member] | Minimum [Member] | Stock Options [Member] |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options Granted in Period, Percent of Increase Over Granted Price for Additional Vesting Criteria |  |  | 125.00%

X
- Definition The percentage increase over granted price based on the NYSE that our common stock must have for 10 consecutive trading days ending on or after the third anniversary of the date of grant for our stock options granted in the current period in order to complete the vesting criteria. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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