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Note 7 - Patents (Detail) (USD $)	9 Months Ended
Note 7 - Patents (Detail) (USD $)	Sep. 30, 2012
Amortization of Intangible Assets	$ 57,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	76,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 65,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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