Quarterly report pursuant to Section 13 or 15(d)

Loss Per Share of Common Stock - Basic and Diluted Loss Per Share of Common Stock (Detail)

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Loss Per Share of Common Stock - Basic and Diluted Loss Per Share of Common Stock (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Calculation of basic loss per share of common stock:        
Net loss attributable to common stockholders $ (931) $ (797) $ (15,483) $ (2,080)
Denominator for basic weighted average shares of common stock 17,739,084 14,196,423 16,685,162 12,613,354
Basic loss per share of common stock $ (0.05) $ (0.06) $ (0.93) $ (0.16)
Calculation of diluted loss per share of common stock:        
Net loss attributable to common stockholders (931) (797) (15,483) (2,080)
Add: Income impact of assumed conversion of senior common stock            
Net loss attributable to common stockholders plus assumed conversions $ (931) $ (797) $ (15,483) $ (2,080)
Denominator for basic weighted average shares of common stock 17,739,084 14,196,423 16,685,162 12,613,354
Effect of convertible senior common stock            
Denominator for diluted weighted average shares of common stock 17,739,084 14,196,423 16,685,162 12,613,354
Diluted loss per share of common stock $ (0.05) $ (0.06) $ (0.93) $ (0.16)