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Note 11 - Stockholders' Equity (Details) (USD $) | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2006 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 12, 2007 | Dec. 31, 2013 Restricted Stock [Member] | Dec. 31, 2012 Restricted Stock [Member] | Dec. 31, 2013 Restricted Stock Units (RSUs) [Member] | Dec. 31, 2012 Restricted Stock Units (RSUs) [Member] | Dec. 31, 2013 Selling, General and Administrative Expenses [Member] | Dec. 31, 2012 Selling, General and Administrative Expenses [Member] | Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2012 The 1989 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2011 The 1989 Non-Qualified Stock Option Plan [Member] | Jun. 15, 1989 The 1989 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member] Minimum [Member] | Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member] Maximum [Member] | Dec. 31, 2011 The 2001 Non-Qualified Stock Option Plan [Member] Director [Member] | Dec. 31, 2013 The 2001 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2012 The 2001 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2011 The 2001 Non-Qualified Stock Option Plan [Member] | Dec. 31, 2013 The 2007 Share Incentive Plan [Member] Director [Member] | Dec. 31, 2012 The 2007 Share Incentive Plan [Member] Director [Member] | Dec. 31, 2011 The 2007 Share Incentive Plan [Member] Director [Member] | Dec. 31, 2010 The 2007 Share Incentive Plan [Member] Director [Member] | Dec. 31, 2011 The 2007 Share Incentive Plan [Member] Directors and Key Employees [Member] | Dec. 31, 2013 The 2007 Share Incentive Plan [Member] | Dec. 31, 2012 The 2007 Share Incentive Plan [Member] | Dec. 31, 2011 The 2007 Share Incentive Plan [Member] | Dec. 31, 2013 Three Plans [Member] | Dec. 31, 2013 Minimum [Member] | Dec. 31, 2013 Maximum [Member]
Note 11 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 300,000 |  |  | 750,000 |  |  |  |  |  |  |  |  |  | 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 7 years |  |  |  | 10 years |  |  |  |  |  |  |  | 10 years |  | 7 years | 10 years
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  | 14,000 | 0 | 0 |  | 28,087 | 19,975 | 200 | 16,500 | 40,400 | 0 | 0 |  |  |  |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |  | $ 7.90 | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25% |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  | $ 461,195 | $ 234,858 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |  | 187,730 |  |  |  |  |  |  |  |  | 35,250 | 41,900 | 102,000 |  |  |  |  | 152,480 | 162,480 | 170,590 |  |  |  |  |  | 0 | 200 | 200 | 187,730 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  | 16,650 | 68,210 |  |  |  |  |  |  |  | 6,650 | 60,100 |  |  |  |  |  | 10,000 | 8,110 |  |  |  |  |  |  | 0 | 0 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  | 90,988 | 442,907 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  |  |  |  | 123,000 | 142,000 | 190,000 | 86,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |  |  |  |  | 132,000 |  | 1,624,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  | 2 years 127 days |  | 2 years 186 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  |  |  |  |  |  | $ 462,000 | $ 235,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: 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 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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