Basic and Diluted Loss Per Common Share - Additional Information (Detail)
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9 Months Ended | |
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Sep. 30, 2014
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Sep. 30, 2013
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Warrants [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Common shares excluded from the calculation | 60,240,698 | 66,238,507 |
Stock Options [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Common shares excluded from the calculation | 13,868,334 | 15,322,206 |
8% Convertible Preferred Stock [Member]
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Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
Common shares excluded from the calculation | 0 | 3,705,000 |