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Inventories (Details) - USD ($)	Dec. 31, 2021	Jun. 30, 2021
Inventories
Raw materials	$ 3,554,854	$ 3,908,630
Work in process	2,224,616	2,473,070
Finished goods	2,806,800	3,467,105
Allowance for obsolescence	(1,271,205)	(1,189,218)
Inventories, net	$ 7,315,065	$ 8,659,587

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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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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