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Inventory Components (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials and sub-assemblies	$ 3,079,027	$ 3,016,327
Finished goods	72,531	67,120
Inventory reserves	(872,310)	(885,181)
Inventories, net	$ 2,279,248	$ 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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