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Note 14 - Stockholders' Equity (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 08, 2015 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Feb. 11, 2015 | Jan. 07, 2015 | Dec. 31, 2014 | Mar. 05, 2014
Note 14 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  | 0 |  |  |  |  |  |
Stock Repurchased and Retired During Period, Value |  | $ 489,536 |  | $ 8,201,681 |  |  |  |  |
Common Stock, Shares, Issued |  | 11,083,976 |  | 11,083,976 |  |  | 11,135,825 | 11,329,732 |
Common Stock, Shares, Outstanding |  | 11,083,976 |  | 11,083,976 |  |  | 11,135,825 | 11,329,732 |
Dutch Auction Tender Offer [Member] |  |  |  |  |  |  |  |  |
Note 14 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares | 193,907 |  |  |  |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 18.50 |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ 3,587,280 |  |  |  |  |  |  |  |
Stock Repurchased Transaction Costs | $ 70,000 |  |  |  |  |  |  |  |
Stock Buyback Program 2015 [Member] |  |  |  |  |  |  |  |  |
Note 14 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  | 25,413 |  | 239,502 |  |  |  |  |
Stock Repurchased and Retired During Period, Value |  | $ 489,536 |  | $ 4,544,592 |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 20,000,000 |  |  |
Stock Buyback Program 2014 [Member] |  |  |  |  |  |  |  |  |
Note 14 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  | 6,092 |  |  |  |
Stock Repurchased and Retired During Period, Value |  |  |  |  | $ 82,286 |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  | $ 20,000,000

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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