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Inventory Components (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials and sub-assemblies	$ 2,705,323	$ 3,016,327
Finished goods	58,635	67,120
Inventory reserves	(870,745)	(885,181)
Inventories, net	$ 1,893,213	$ 2,198,266

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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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