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Note 5 - Capital Stock, Stock Plans and Stock-based Compensation (Details Textual) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 15, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
The 2010 Stock Option Plan [Member] | Executive Vice President [Member] | Incentive Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 50,000 |  |  |  |
The 2010 Stock Option Plan [Member] | Incentive Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 6 years |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |  |  |
The 2010 Stock Option Plan [Member] | Non-qualified Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 3.97 |  |  |  |
The 2003 Outside Directors Stock Plan [Member] |  |  |  |  |
Stock Issued During Period, Shares, Share-based Compensation, Gross |  |  |  | 30,741 |
Allocated Share-based Compensation Expense |  |  |  | $ 124,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures |  |  |  | 50,000 |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |  |  |  | $ 3.97 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit |  |  |  | 2.79 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit |  |  |  | $ 14.75 |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |  | $ 109,000 |  | $ 109,000 |
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost Not Yet Recognized, Remainder of Fiscal Year |  | 32,000 |  | 32,000 |
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost not yet Recognized in Year Two |  | 46,000 |  | 46,000 |
Employee Service Share-based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized in Year Three |  | 30,000 |  | 30,000 |
Employee Service Share-based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized In Year Four |  | 1,000 |  | 1,000 |
Allocated Share-based Compensation Expense |  | $ 17,000 | $ 13,000 | $ 45,000 | $ 46,000

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- Definition Represents unrecognized compensation cost related to unvested share options to be recognized during the remainder of fiscal year. + 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://www.xbrl.org/2003/role/presentationRef -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=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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