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v3.19.3.a.u2

Note 13 - Equity Incentive Plan - Granted and Exercised Stock-based Compensation Awards (Details) - shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement, Option [Member] |  |
Grants: |  |
Stock options (in shares) | 254,517 | 199,970
Exercises: |  |
Stock options (in shares) | 518,991 | 284,548
Restricted Stock [Member] |  |
Grants: |  |
Restricted stock grants (in shares) |  | 64,578
Restricted Stock Units (RSUs) [Member] |  |
Grants: |  |
Restricted stock grants (in shares) | 189,507 | 15,457
Performance Restricted Stock Units [Member] |  |
Grants: |  |
Restricted stock grants (in shares) | 123,500 |
Stock Appreciation Rights (SARs) [Member] |  |
Exercises: |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised | 35,250 |

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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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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