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Note 8 - Common Shares (Details) (USD $) | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 07, 2013 | Mar. 31, 2013 | Mar. 16, 2012 | Jan. 23, 2012 | Jun. 30, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Disclosure Text Block Supplement [Abstract] |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  |  |  | 250,000,000 | 250,000,000 | 250,000,000 |
Common Stock, Shares, Outstanding | 10,056,719 |  |  | 11,511,764 |  | 11,080,540 | 10,907,063 | 11,080,540 |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  |  |  |  |  |  | 4 |  |
Stock Repurchased and Retired During Period, Shares | 1,028,531 | 35,769 |  | 1,892,559 |  | 592,801 |  |  |
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share) | $ 6.00 |  |  | $ 3.08 |  |  |  |  |
Stock Repurchased and Retired During Period, Value (in Dollars) | $ 6,171,656 |  |  | $ 5,829,082 | $ 259,875 |  | $ (6,537,616) | $ (9,115,833) | $ (18,442)
Stock Repurchased And Retired During Period Transaction Cost (in Dollars) | 106,000 |  |  | 64,000 |  |  |  |  |
Proceeds from Lines of Credit (in Dollars) | $ 5,200,000 |  |  | $ 4,000,000 |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  | 2,500,000 | 960,000 |  |  |  |  |  |
Stock Repurchase Program, Period in Force |  | 12 months | 12 months |  |  |  |  |  |

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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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