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Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations attributable to Rick's shareholders |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,334 |  | $ 7,750 |  | $ 10,041 |
Loss from discontinued operations, net of income taxes |  |  |  |  |  |  |  |  |  |  |  |  | (143) |  | (172) |  | (2,195) |
Net income attributable to Rick’s Cabaret International, Inc. | 1,604 | 2,195 | 2,745 | 2,647 | 1,453 | 1,823 | 2,117 | 2,185 | 1,959 | 888 | 2,923 | 2,076 | 9,191 |  | 7,578 |  | 7,846 |
Average number of common shares outstanding | 9,504 | 9,479 | 9,514 | 9,575 | 9,633 | 9,725 | 9,720 | 9,685 | 9,815 | 9,924 | 9,937 | 10,043 | 9,518 |  | 9,691 |  | 9,930 |
Basic earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations attributable to Rick's shareholders | $ 0.17 | $ 0.24 | $ 0.29 | $ 0.28 | $ 0.15 | $ 0.19 | $ 0.23 | $ 0.23 | $ 0.21 | $ 0.25 | $ 0.33 | $ 0.23 | $ 0.98 |  | $ 0.80 |  | $ 1.01 |
Discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  | $ (0.02) |  | $ (0.02) |  | $ (0.22) |
Net income (loss) attributable to Rick's shareholders | $ 0.17 | $ 0.23 | $ 0.29 | $ 0.28 | $ 0.15 | $ 0.19 | $ 0.22 | $ 0.23 | $ 0.20 | $ 0.09 | $ 0.29 | $ 0.21 | $ 0.97 |  | $ 0.78 |  | $ 0.79 |
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations attributable to Rick's shareholders |  |  |  |  |  |  |  |  |  |  |  |  | 9,334 |  | 7,750 |  | 10,041 |
Adjustment. to net earnings from assumed conversion of debentures (1) |  |  |  |  |  |  |  |  |  |  |  |  | 57 | [1] | 0 | [1] | 0 | [1]
Adjusted income (loss) from continuing operations |  |  |  |  |  |  |  |  |  |  |  |  | 9,391 |  | 7,750 |  | 10,041 |
Discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  | (143) |  | (172) |  | (2,195) |
Adjusted net income (loss) attributable to Rick's shareholders |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,248 |  | $ 7,578 |  | $ 7,846 |
Average number of common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares outstanding |  |  |  |  |  |  |  |  |  |  |  |  | 9,518 |  | 9,691 |  | 9,930 |
Potential dilutive shares resulting from exercise of warrants and options (2) |  |  |  |  |  |  |  |  |  |  |  |  | 4 | [2] | 6 | [2] | 2 | [2]
Potential dilutive shares resulting from conversion of debentures (1) |  |  |  |  |  |  |  |  |  |  |  |  | 93 | [1] | 0 | [1] | 0 | [1]
Total average number of common shares outstanding used for dilution | 9,603 | 9,647 | 9,988 | 9,833 | 9,636 | 9,731 | 9,731 | 9,687 | 9,817 | 9,941 | 10,771 | 10,045 | 9,615 |  | 9,697 |  | 9,932 |
Diluted earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations (in dollars per share) | $ 0.17 | $ 0.24 | $ 0.29 | $ 0.28 | $ 0.15 | $ 0.19 | $ 0.23 | $ 0.23 | $ 0.21 | $ 0.25 | $ 0.32 | $ 0.23 | $ 0.98 |  | $ 0.80 |  | $ 1.01 |
Loss from discontinued operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ (0.01) |  | $ (0.02) |  | $ (0.22) |
Net income (loss) attributable to Rick's shareholders | $ 0.17 | $ 0.23 | $ 0.29 | $ 0.28 | $ 0.15 | $ 0.19 | $ 0.22 | $ 0.23 | $ 0.20 | $ 0.09 | $ 0.29 | $ 0.21 | $ 0.96 |  | $ 0.78 |  | $ 0.79 |
[1] | Represents interest expense on dilutive convertible securities that would not occur if they were assumed converted.
[2] | All outstanding warrants and options were considered for the EPS computation.

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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