Note 3 - Stock-based Compensation (Details) (USD $) | 1 Months Ended | 3 Months Ended |
Feb. 28, 2015 | Feb. 28, 2014 | Mar. 31, 2015 | Mar. 31, 2014 |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | | | 0 | $0 |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Executive Officers, Non-employee Directors and Other Key Employees [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | | | 300,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years | 4 years | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 4 years | 4 years | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Chief Executive Officer [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 9,343 | 9,375 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Chief Financial Officer [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 9,343 | 9,375 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Senior Vice President [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 9,343 | 9,375 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Independent Director 1 [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 1,613 | 1,619 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Independent Director 2 [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 1,613 | 1,619 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Independent Director 3 [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 1,613 | 1,619 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | Independent Director 4 [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 1,613 | 1,619 | | |
Restricted Stock [Member] | Restricted Stock Plan [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | 4 years | |
Restricted Stock [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | | | 523,154 | 310,025 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | 34,484 | 34,601 |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | | | 4 years | |
2007 Director Non-Qualified Stock Option Plan [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | | | 10 years | |
Director [Member] | | | | |
Note 3 - Stock-based Compensation (Details) [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | | 0 | 0 |
Allocated Share-based Compensation Expense (in Dollars) | | | 0 | $0 |