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Note 10 - Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended | 13 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 03, 2011 | Mar. 07, 2008 | Jan. 29, 2013 | Dec. 30, 2011 | Dec. 30, 2010 | Dec. 31, 2015 | Dec. 31, 2014 | Jan. 29, 2014 | Jun. 02, 2014 | Jun. 30, 2004
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  |  |  |  |  | 1,750,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized for Grants other than Options |  |  |  |  |  |  |  |  | 800,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 50,000 | 50,000 |  |  |  | 4.68 | 3.94 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (2004 LTIP) |  |  |  |  |  |  | 1,447,219 |  |  |
Share Price (in Dollars per share) | $ 6.58 | $ 12.74 |  |  |  |  |  |  |  |
Share Based Payment Award, Options, Annual Incremental Vesting | 12,500 |  |  |  |  |  |  |  |  |
Share Based Payment Award, Options, Term |  |  |  | 5 years |  |  |  |  |  |
Share-based Compensation (in Dollars) |  |  |  |  |  | $ 571 | $ 1,003 |  |  |
Share-based compensation relating to options |  |  |  |  |  |  | 614 |  |  |
Share-based compensation relating to restricted stock units - CEO |  |  |  |  |  |  | 150 |  |  |
Share-based compensation relating to restricted stock units - others |  |  |  |  |  |  | $ 29 |  |  |
Grant date fair value of restricted stock units awarded |  |  |  |  |  |  | $ 3.24 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) |  |  |  |  |  | $ 440 | $ 381 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  |  | 1 year 256 days | 1 year 146 days |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) |  |  |  |  |  | $ 2.32 | $ 1.6 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars) |  |  |  |  |  | $ 364 | $ 3 |  |  |
Proceeds from Stock Options Exercised (in Dollars) |  |  |  |  |  | 538 | 11 |  |  |
Excess tax benefits from option exercises |  |  |  |  |  | 287 | 0 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) |  |  |  |  |  | $ 49 | $ 130 |  |  |
Shares of common stock reserved for issuance under all plans |  |  |  |  |  | 3,596,719 |  |  |  |
Long Term Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  |  |  |  |  |  | 750,000
Contingent Restricted Stock Units [Member] | President And Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  | 120,000 |  |  |  |  |  |  |
Option Grant 2 [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  | 4 years |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  | 250,000 |  |  |  |  |  |
Share Price (in Dollars per share) |  |  |  | $ 6.42 |  |  |  | $ 5.00 |  |
Share Based Payment Award, Options, Annual Incremental Vesting |  |  |  | 62,500 |  |  |  | 30,000 |  |
Number of days in period minimum share price requirement |  |  | 15 days |  |  |  |  |  |  |
Number Of Days In Period, Minimum Share Price Requirement, Term |  |  | 30 days |  |  |  |  |  |  |
Option Grant 4 [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  | 4 years |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  | 200,000 |  |  |  |  |  |
Share Price (in Dollars per share) |  |  | $ 5.00 |  | $ 15.00 |  |  |  |  |
Share Based Payment Award, Options, Annual Incremental Vesting |  |  | 30,000 | 50,000 |  |  |  |  |  |
Minimum Share Price Requirement (in Dollars per share) |  |  |  |  | $ 15.00 |  |  |  |  |
Number of days in period minimum share price requirement |  |  | 15 days | 15 days |  |  |  |  |  |
Number Of Days In Period, Minimum Share Price Requirement, Term |  |  | 30 days | 30 days |  |  |  |  |  |
Option Grant 3 [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  | 4 years |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  | 200,000 |  |  |  |  |  |
Share Price (in Dollars per share) |  |  | $ 4.00 | $ 10.00 |  |  |  |  |  |
Share Based Payment Award, Options, Annual Incremental Vesting |  |  | 30,000 | 50,000 |  |  |  |  |  |
Minimum Share Price Requirement (in Dollars per share) |  |  |  | $ 10.00 |  |  |  |  |  |
Number of days in period minimum share price requirement |  |  | 15 days | 15 days |  |  |  |  |  |
Number Of Days In Period, Minimum Share Price Requirement, Term |  |  | 30 days | 30 days |  |  |  |  |  |
Option Grant 1 [Member] |  |  |  |  |  |  |  |  |  |
Note 7 - Shareholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  | 4 years |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  | 50,000 |  |  |  |  |
Share Price (in Dollars per share) |  |  | $ 4.00 |  | $ 6.42 |  |  |  |  |
Share Based Payment Award, Options, Annual Incremental Vesting |  |  | 30,000 |  | 12,500 |  |  |  |  |
Number of days in period minimum share price requirement |  |  |  |  |  |  |  | 15 days |  |
Number Of Days In Period, Minimum Share Price Requirement, Term |  |  |  |  |  |  |  | 30 days |  |

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