The components of inventory consisted of the following: (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 2,067,297	$ 2,218,981
Work in progress	1,786,942	2,645,548
Finished goods (includes completed components)	4,082,575	4,251,982
Gross inventory	7,936,814	9,116,511
Inventory reserves	(2,655,653)	(2,730,223)
Inventory, net	$ 5,281,161	$ 6,386,288

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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 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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