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Note 11 - Share-based Compensation - Stock-settled Stock Appreciation Rights Transactions (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Outstanding SARS (in shares) | 206,700 |
Outstanding SARS, weighted average exercise price (in dollars per share) | $ 18.67 |
Outstanding SARS, weighted average remaining life (Year) | 3 years 4 months 9 days | 2 years 14 days
Outstanding SARS, aggregate intrinsic value | $ 2,031 | $ 0
Granted SARs (in shares) | 225,625 |
Granted SARS, weighted average exercise price (in dollars per share) | $ 10.08 |
Exercised SARs (in shares) | (46,696) |
Exercised SARS, weighted average exercise price (in dollars per share) | $ 16.46 |
Lapsed or cancelled (in shares) | (68,501) |
Lapsed or cancelled, weighted average exercise price (in dollars per share) | $ 15.97 |
Outstanding SARS (in shares) | 317,128 | 206,700
Outstanding SARS, weighted average exercise price (in dollars per share) | $ 13.47 | $ 18.67
Exercisable (in shares) | 79,372 |
Exercisable, weighted average exercise price (in dollars per share) | $ 20.42 |
Exercisable, weighted average remaining life (Year) | 1 year 6 months 21 days |
Exercisable, aggregate intrinsic value | $ 238 |

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- Definition The weighted average exercise price for non-option equity instruments. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of SARS exercised during the reporting period as calculated by applying the disclosed option pricing methodology. + References No definition available. + Details
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- Definition The weighted average exercise price of non-option equity instruments granted during the period. + References No definition available. + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of non-option equity awards outstanding and currently exercisable. + References No definition available. + Details
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- Definition Number of non-option equity instruments exercisable. + References No definition available. + Details
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- Definition Weighted average price at which the shares can be exercisable. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for vested portions of non-options equity instruments outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of non-option equity awards outstanding. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for non-option equity awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of SARS cancelled during the reporting period as calculated by applying the disclosed option pricing methodology. + References No definition available. + 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=120381028&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements that were either cancelled or expired. + 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)(3)-(4) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Net number of non-option equity instruments granted to 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + 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)(ii) -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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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