Note 8 - Intangible Assets (Details) (USD $)	9 Months Ended
Feb. 28, 2013	Feb. 29, 2012
Amortization of Intangible Assets	$ 91,331	$ 91,345

- Definition

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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