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Note 14 - Employee Benefit Plans (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 4.50% |  |  |
Defined Contribution Plan, Cost Recognized | $ 297,826 | $ 650,016 | $ 264,672 |
Deferred Compensation Liability, Current and Noncurrent | 8,875,025 | 7,503,692 | 6,224,368 | $ 5,151,630
Deferred Compensation Arrangement with Individual, Employer Contribution | 693,656 | 628,589 | 525,469 |
Supplemental Executive Retirement Plans [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Deferred Compensation Arrangement with Individual, Recorded Liability | 317,418 |  |  |
Deferred Compensation Liability, Current and Noncurrent | 3,934,605 | 3,800,603 |  |
Defined Benefit Plan, Contributions by Employer | 163,824 | 117,000 | $ 117,000 |
Agreements with Certain Management and Executive Officers [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Deferred Compensation Liability, Current and Noncurrent | $ 8,875,025 | $ 7,503,692 |  |
First 3% of Employees Wages [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 100.00% |  |  |
Match at 100% [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 3.00% |  |  |
From 4% to 4.5% of Employees Wages [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 50.00% |  |  |
Matched at 50% [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 3.00% |  |  |
Minimum [Member] | Certain Executive Officers [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Deferred Compensation Arrangement with Individual, Employer Contribution | $ 8,000 |  |  |
Interest on Deferred Compensation Amounts | 4.00% |  |  |
Minimum [Member] | Certain Management Officers [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 4.00% |  |  |
Interest on Deferred Compensation Amounts | 4.00% |  |  |
Maximum [Member] | Certain Executive Officers [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Deferred Compensation Arrangement with Individual, Employer Contribution | $ 25,000 |  |  |
Interest on Deferred Compensation Amounts | 12.00% |  |  |
Maximum [Member] | Certain Management Officers [Member] |  |  |  |
Note 14 - Employee Benefit Plans (Details) [Line Items] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 10.00% |  |  |
Interest on Deferred Compensation Amounts | 8.00% |  |  |

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