Inventories - Inventories (Details) - USD ($)	Jan. 31, 2020	Oct. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 2,296,135	$ 2,035,612
Work in process	1,417,361	1,239,861
Finished goods	128,584	843,584
Inventories	$ 3,842,080	$ 4,119,057

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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