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Calculation of Basic and Diluted Net Income (Loss) Per Common Share (Parenthetical) (Detail)
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0 Months Ended | 12 Months Ended | ||
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Dec. 03, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Earnings Per Share Calculation Basic And Diluted [Line Items] | ||||
| Common stock reverse split ratio | 0.1 | |||
| Common stock equivalents | ||||