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Note 12 - Fair Value Measurements (Detail) - Summary of fair value measurement information for financial assets and liabilities measured at fair value on a recurring basis (USD $)	Mar. 31, 2013
Swaps [Member] \| Fair Value, Inputs, Level 2 [Member]
Derivative Contract	$ (896,886)
Swaps [Member]
Derivative Contract	(896,886)
Collars [Member] \| Fair Value, Inputs, Level 3 [Member]
Derivative Contract	(362,828)
Collars [Member]
Derivative Contract	$ (362,828)

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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