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Note 6 - Share-based Compensation - Stock-settled Stock Appreciation Rights Transactions (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Outstanding SARS (in shares) |  | 182,894 |
Outstanding SARS, weighted average exercise price (in dollars per share) |  | $ 18.99 |
Outstanding SARS, weighted average remaining life (Year) |  | 2 years 105 days | 2 years 222 days
Outstanding SARS, aggregate intrinsic value |  |  | $ 89
Granted SARs (in shares) | [1] | 42,841 |
Granted SARS, weighted average exercise price (in dollars per share) | [1] | $ 17.77 |
Exercised SARs (in shares) |  |  |
Exercised SARS, weighted average exercise price (in dollars per share) |  |  |
Cancelled SARs (in shares) |  | (19,035) |
Cancelled SARS, weighted average exercise price (in dollars per share) |  | $ 19.67 |
Outstanding SARS (in shares) |  | 206,700 | 182,894
Outstanding SARS, weighted average exercise price (in dollars per share) |  | $ 18.67 | $ 18.99
Exercisable SARs (in shares) |  | 168,478 |
Exercisable SARs, weighted average exercise price (in dollars per share) |  | $ 18.88 |
Exercisable SARs, weighted average remaining life (Year) |  | 1 year 299 days |
Exercisable SARs, aggregate intrinsic value |  |  |
[1] | The weighted average grant date fair value of SARs granted was $3.97 per share.

X
- 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=116856206&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements for which rights to exercise lapsed. + 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)(4) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&loc=d3e5070-113901 + Details
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