Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Property, Plant and Equipment (Details Textual)

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Note 7 - Property, Plant and Equipment (Details Textual) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended
Dec. 05, 2018
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Depreciation, Total $ 2.1 $ 5.2 $ 4.3 $ 8.7 $ 8.3