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Note 12 - Long-term Incentive Plan - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Outstanding outstanding (in shares) | 760,000 | 760,000
Options granted (in shares) |  |
Options exercised (in shares) | (72,000) |
Options cancelled or forfeited (in shares) |  |
Outstanding outstanding (in shares) | 688,000 | 760,000
Options Vested (in shares) | 634,000 |
Options exercisable (in shares) | 634,000 |
Weighted average exercise price, options outstanding (in dollars per share) | $ 2.51 | $ 2.51
Weighted average exercise price, options granted (in dollars per share) |  |
Weighted average exercise price, options exercised (in dollars per share) | 2.37 |
Weighted average exercise price, options cancelled or forfeited (in dollars per share) |  |
Weighted average exercise price, options outstanding (in dollars per share) | 2.52 | 2.51
Weighted average exercise price, options vested (in dollars per share) | 2.58 |
Weighted average exercise price, options exercisable (in dollars per share) | 2.58 |
Weighted average fair value at grant date, options outstanding (in dollars per share) | 1 | 1
Weighted average fair value at grant date, options exercised (in dollars per share) | 0.92 |
Weighted average fair value at grant date, options outstanding (in dollars per share) | 1 | $ 1
Weighted average fair value at grant date, options vested (in dollars per share) | 1.05 |
Weighted average fair value at grant date, options exercisable (in dollars per share) | $ 1.05 |
Aggregate intrinsic value, options outstanding | $ 89,760 |
Aggregate intrinsic value, options vested | 45,480 |
Aggregate intrinsic value, options exercisable | $ 45,480 |

X
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited 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=109197908&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=109197908&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)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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