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Business Acquisition - Pro forma financial information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Oct. 31, 2019 | Oct. 31, 2018
Business Acquisition |  |
Revenue | $ 59,250 | $ 58,658
Net income | $ 3,370 | $ 5,419
Earnings per share |  |
Basic | $ 0.36 | $ 0.60
Diluted | $ 0.34 | $ 0.56

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