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Note 16 - Stockholders' Equity - Vesting Schedule (Details) | 12 Months Ended
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Dec. 31, 2017
Vesting period | 3 years
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche One [Member] | Awards Using Vesting Schedule A [Member] |
Vesting period | 1 year
Vesting percentage | 25.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche One [Member] | Awards Using Vesting Schedule B [Member] |
Vesting period | 2 years
Vesting percentage | 33.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche One [Member] | Awards Using Vesting Schedule C [Member] |
Vesting period | 4 years
Vesting percentage | 50.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche One [Member] | Awards Using Vesting Schedule D [Member] |
Vesting period | 180 days
Vesting percentage | 20.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Two [Member] | Awards Using Vesting Schedule A [Member] |
Vesting period | 2 years
Vesting percentage | 50.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Two [Member] | Awards Using Vesting Schedule B [Member] |
Vesting period | 3 years
Vesting percentage | 67.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Two [Member] | Awards Using Vesting Schedule C [Member] |
Vesting period | 4 years 270 days
Vesting percentage | 100.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Two [Member] | Awards Using Vesting Schedule D [Member] |
Vesting period | 1 year 180 days
Vesting percentage | 40.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Three [Member] | Awards Using Vesting Schedule A [Member] |
Vesting period | 3 years
Vesting percentage | 75.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Three [Member] | Awards Using Vesting Schedule B [Member] |
Vesting period | 4 years
Vesting percentage | 100.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Three [Member] | Awards Using Vesting Schedule D [Member] |
Vesting period | 2 years 180 days
Vesting percentage | 60.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Four [Member] | Awards Using Vesting Schedule A [Member] |
Vesting period | 4 years
Vesting percentage | 100.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Four [Member] | Awards Using Vesting Schedule D [Member] |
Vesting period | 3 years 180 days
Vesting percentage | 80.00%
Stock Incentive Plan 2009 [Member] | Share-based Compensation Award, Tranche Five [Member] | Awards Using Vesting Schedule D [Member] |
Vesting period | 4 years 180 days
Vesting percentage | 100.00%

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of share-based compensation awards. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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