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Income (Loss) Per Common Share - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive common stock equivalents excluded from diluted income (loss) per common share calculation 235,380 235,380 235,380 235,380