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Note 7 - Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Stock options and SARs |  | $ | 327 |  |  | $ | 412 |  |  | $ | 1,105 |  |  | $ | 921 |
Restricted stock |  |  | 545 |  |  |  | 203 |  |  |  | 1,183 |  |  |  | 566 |
Performance shares |  |  | 216 |  |  |  | 114 |  |  |  | 469 |  |  |  | 303 |
Total share-based compensation expense |  | $ | 1,088 |  |  | $ | 729 |  |  | $ | 2,757 |  |  | $ | 1,790 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  | Weighted Average |  |  | Aggregate |
|  | No. of |  |  | Weighted Average |  |  | Remaining Life |  |  | Intrinsic Value |
|  | Shares |  |  | Exercise Price |  |  | (in years) |  |  | (in thousands) |
Outstanding, January 1, 2021 |  |  | 970,022 |  |  | $ | 12.92 |  |  |  | 3.74 |  |  | $ | 11,128 |
Granted(1) |  |  | 143,543 |  |  |  | 25.02 |  |  |  |  |  |  |  |  |
Exercised |  |  | (262,960 | ) |  |  | 10.10 |  |  |  |  |  |  |  |  |
Lapsed or cancelled |  |  | (19,126 | ) |  |  | 14.90 |  |  |  |  |  |  |  |  |
Outstanding, September 30, 2021 |  |  | 831,479 |  |  |  | 15.86 |  |  |  | 3.43 |  |  |  | 6,487 |
Exercisable, September 30, 2021 |  |  | 487,161 |  |  |  | 14.66 |  |  |  | 2.83 |  |  |  | 4,231 |
Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] |
|  |  |  |  |  |  |  | Weighted Average |  |  | Aggregate |
|  | No. of |  |  | Weighted Average |  |  | Remaining Life |  |  | Intrinsic Value |
|  | Shares |  |  | Exercise Price |  |  | (in years) |  |  | (in thousands) |
Outstanding, January 1, 2021 |  |  | 317,128 |  |  | $ | 13.47 |  |  |  | 3.36 |  |  | $ | 2,031 |
Granted(1) |  |  | 31,687 |  |  |  | 25.75 |  |  |  |  |  |  |  |  |
Exercised |  |  | (26,438 | ) |  |  | 14.74 |  |  |  |  |  |  |  |  |
Outstanding, September 30, 2021 |  |  | 322,377 |  |  |  | 14.57 |  |  |  | 2.88 |  |  |  | 2,899 |
Exercisable, September 30, 2021 |  |  | 160,586 |  |  |  | 15.29 |  |  |  | 2.20 |  |  |  | 1,296 |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | No. of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Outstanding, January 1, 2021 |  |  | 157,244 |  |  | $ | 16.84 |
Granted |  |  | 264,166 |  |  |  | 23.16 |
Vested |  |  | (24,908 | ) |  |  | 23.55 |
Outstanding, September 30, 2021 |  |  | 396,502 |  |  |  | 20.63 |
Schedule of Nonvested Performance-based Units Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | No. of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Outstanding, January 1, 2021 |  |  | 186,264 |  |  | $ | 18.28 |
Granted |  |  | 116,405 |  |  |  | 22.13 |
Vested |  |  | (57,255 | ) |  |  | 17.54 |
Forfeited |  |  | (36,141 | ) |  |  | 15.19 |
Outstanding, September 30, 2021 |  |  | 209,273 |  |  |  | 21.16 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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