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Note 15 - Stockholders' Equity (Details) (USD $) | 3 Months Ended | 0 Months Ended | 3 Months Ended |  | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Jun. 25, 2014 IPO [Member] Underwriter [Member] | Jun. 25, 2014 IPO [Member] | Sep. 30, 2014 IPO [Member] | Jun. 25, 2014 IPO [Member] | Sep. 30, 2014 Employee Stock Option [Member] The 2005 Plan [Member] | Sep. 30, 2014 Employee Stock Option [Member] | Sep. 30, 2013 Employee Stock Option [Member] | Sep. 30, 2014 Employee Stock Option [Member] | Sep. 30, 2013 Employee Stock Option [Member] | Sep. 30, 2014 Deferred Stock Units (DSUs) [Member] Directors and Employees [Member] | Sep. 30, 2014 Deferred Stock Units (DSUs) [Member] | Sep. 30, 2013 Deferred Stock Units (DSUs) [Member] | Sep. 30, 2014 Deferred Stock Units (DSUs) [Member] | Sep. 30, 2013 Deferred Stock Units (DSUs) [Member]
Note 15 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in Shares) |  | 1,200,000 | 5,840,000 |  |  |  |  |  |  |  |  |  |  |  |
Share Price (in Dollars per share) |  |  |  |  | $ 7.00 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance Initial Public Offering | $ 40,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments of Stock Issuance Costs |  |  |  | 6,200,000 |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance Initial Public Offering, Net of Issuance Costs | 34,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated Share-based Compensation Expense |  |  |  |  |  |  | 2,000,000 | 2,200,000 | 5,100,000 | 4,500,000 |  | 500,000 | 200,000 | 1,200,000 | 400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options |  |  |  |  |  | 13,800,000 |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  |  | 2 years 6 months |  |  |  |  |  |  |  | 3 years 146 days |
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Number of Shares of Common Stock Per Award (in Shares) | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options |  |  |  |  |  |  |  |  |  |  |  | $ 5,800,000 |  | $ 5,800,000 |

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