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Note H - Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

		2017												2016
		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount
Patents and patents pending		$	347,946			$	(166,842	)		$	181,104			$	287,248			$	(153,116	)		$	134,132
Total		$	347,946			$	(166,842	)		$	181,104			$	287,248			$	(153,116	)		$	134,132

X

- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration