Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Schedule Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Numerator for basic earnings per share calculation - income attributable to common shareholders	$ (3,093,996)	$ 3,188,453
Interest on 8% convertible promissory notes		265,882
Dividends for 10% convertible preferred stock		159,797
Accretion of discount on 10% convertible preferred stock		221,386
Numerator for diluted earnings per share calculation - income attributable to common shareholders		$ 3,835,518
Denominator for basic earnings per share - weighted-average shares outstanding	72,062,040	31,874,213
Denominator for diluted earnings per share	72,062,040	90,963,201
Basic earnings per share	$ (0.04)us-gaap_EarningsPerShareBasic	$ 0.10us-gaap_EarningsPerShareBasic
Diluted earnings per share	$ (0.04)us-gaap_EarningsPerShareDiluted	$ 0.04us-gaap_EarningsPerShareDiluted
Options and warrants
Schedule Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Denominator for diluted earnings per share		13,845,932
8% convertible promissory notes
Schedule Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Denominator for diluted earnings per share		38,296,826
10% convertible preferred stock warrants
Schedule Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Denominator for diluted earnings per share		6,946,230

Accretion of discount on preferred net of tax.

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The after-tax amount of any dividends on convertible preferred stock.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The after-tax amount of interest recognized in the period associated with any convertible debt.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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