Project Assets - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jan. 31, 2020 USD ($) ProjectAsset	Jan. 31, 2019 USD ($)	Oct. 31, 2019 USD ($) ProjectAsset
Project Assets [Abstract]
Long-term project assets	$ 147,924		$ 144,115
Number of project assets | ProjectAsset	7		7
Sale leaseback transaction, net book value	$ 56,300		$ 71,800
Project asset depreciation	2,600	$ 1,100
Long-term project assets construction in progress	$ 76,100		$ 84,900