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Note 18 - Quarterly Results of Operations (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2012 | Jan. 31, 2012 | Oct. 31, 2010 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2016 | Oct. 31, 2015 | Oct. 31, 2014
Net sales |  |  |  | $ 17,312,823 | $ 16,915,135 | $ 16,340,153 | $ 14,047,890 | $ 16,752,447 | $ 20,781,340 | $ 18,676,107 | $ 17,358,844 | $ 64,616,001 | $ 73,568,738 | $ 82,977,732
Gross profit |  |  |  | 6,209,719 | 5,461,691 | 4,551,295 | 3,502,431 | 5,032,342 | 5,708,843 | 5,669,311 | 5,385,391 | 19,725,136 | 21,795,887 | 28,472,362
Selling, general and administrative expenses |  |  |  | 5,246,838 | 5,074,839 | 5,351,577 | 5,087,481 | 5,763,206 | 6,084,514 | 6,474,414 | 5,720,420 | 20,760,735 | 24,042,554 | 26,989,262
Income (loss) before income taxes |  |  |  | 759,876 | 181,003 | (992,653) | (1,743,321) | (862,649) | (516,247) | (938,546) | (497,621) | (1,795,095) | (2,815,063) | 890,580
Net income (loss) attributable to Optical Cable Corporation |  |  |  | $ 761,158 | $ 188,163 | $ (983,122) | $ (1,745,021) | $ (2,964,766) | $ (572,572) | $ (490,144) | $ (228,183) | $ (1,778,822) | $ (4,255,665) | $ 684,227
Net income (loss) attributable to Optical Cable Corporation per share - basic and diluted (in dollars per share) |  |  |  | $ 0.11 | $ 0.03 | $ (0.15) | $ (0.28) | $ (0.48) | $ (0.09) | $ (0.08) | $ (0.04) | $ (0.28) | $ (0.69) | $ 0.10
Dividends declared per share (in dollars per share) | $ 0.02 | $ 0.015 | $ 0.01 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0 | $ 0.08 | $ 0.08

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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