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Note 8 - Stock-based Compensation and Other Plans (Details Textual) - USD ($) |  | 3 Months Ended | 5 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
May 02, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 600,000 |  | 600,000 | 600,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  | 0 |  |  |  |
Employee Stock Option [Member] |  |  |  |  |  |
Allocated Share-based Compensation Expense, Total |  | $ 49,000 | $ 37,000 |  | $ 139,000 | $ 146,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense |  | 19,000 | 14,000 |  | 53,000 | 55,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total |  | 496,000 |  | $ 496,000 | 496,000 |
Restricted Stock [Member] |  |  |  |  |  |
Allocated Share-based Compensation Expense, Total |  | 5,000 | 11,000 |  | 32,000 | 32,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense |  | 2,000 | $ 4,000 |  | 12,000 | $ 12,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total |  | $ 9,000 |  | $ 9,000 | $ 9,000 |
The 2018 Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  | 1 year |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 600,000 |  | 600,000 | 600,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  |  | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  | 335,000 |  | 335,000 | 335,000 |
The 2008 Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 0 |  |  |  |  |
Share-based Compensation Arrangement By Share-based Payment Award, Remaining for Grant Awards Cancelled | 345,750 |  |  |  |  |

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- Definition Represents the number of remaining-for-grant awards cancelled on a certain date or during a certain date range. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: 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=109197908&loc=d3e5047-113901 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=115993241&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 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + 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)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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