7. Discontinued Operations (Detail) - Table of Discontinued Operations (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income (loss) from operations	$ 21,186,510	$ 4,630,874	$ (3,395,386)
Segment, Discontinued Operations [Member]
Sales from external customers		34,960,409	1,261,472
Intersegment sales		9,938,301	27,151,876
Income (loss) from operations		2,613,122	(6,499,869)
Loss on sale of subsidiaries		(8,318,350)
Net loss from discontinued operations		$ (5,705,228)	$ (6,499,869)

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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