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Note 12 - Stock Incentive Plan (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Nonvested Share Activity [Table Text Block] |
Non-vested Shares |  | Shares |  |  | Weighted-Average Grant-Date Fair Value |
Non-vested on January 1, 2012 |  |  | 372,500 |  |  | $ | 1,250,500 |
Granted |  |  | 554,200 |  |  |  | 629,822 |
Vested |  |  | (300,300 | ) |  |  | (879,648 | )
Forfeited |  |  | - |  |  |  | - |
Non-vested on December 31, 2012 |  |  | 626,400 |  |  |  | 1,000,674 |

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- Definition Tabular disclosure of the changes in outstanding nonvested 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration