Inventories (Schedule Of Inventories) (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Inventories
Raw materials	$ 8,059,469	$ 7,679,922
Work-in-process	461,430	289,848
Finished products	1,365,819	1,390,200
Reserve for excess and obsolete inventory	(7,006,046)	(7,018,610)
Inventories, total	$ 2,880,672	$ 2,341,360

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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 merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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