Inventories - Inventories (Details) - USD ($)	Oct. 31, 2018	Oct. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 1,901,707	$ 2,287,901
Work in process	2,166,663	1,966,519
Finished goods	188,715	175,228
Inventories	$ 4,257,085	$ 4,429,648

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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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