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Note 5 - Stock-Based Compensation (Details) - Restricted Stock Units | 0 Months Ended | 12 Months Ended | 9 Months Ended
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May 17, 2013 | Apr. 15, 2013 | Mar. 14, 2013 | Dec. 31, 2012 | Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]
Note 5 - Stock-Based Compensation (Details) - Restricted Stock Units [Line Items] |  |  |  |  |
Balance at December 31, 2012 |  |  |  |  | 256,616
Balance at September 30, 2013 |  |  |  |  | 212,676
Granted | 1,454 | 6,729 | 14,416 | 125,133 | 22,599
Forfeited |  |  |  |  | 0
Vested |  |  |  |  | (66,539)

X
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