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 ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Calculation of basic loss per share of common stock:        
Net loss attributable to common stockholders $ (384) $ (2,329) $ (671) $ (3,385)
Denominator for basic weighted average shares of common stock (in shares) 27,234,569 23,509,054 25,833,423 22,915,086
Basic loss per share of common stock (in dollars per share) $ (0.01) $ (0.10) $ (0.03) $ (0.15)
Calculation of diluted loss per share of common stock:        
Net loss attributable to common stockholders $ (384) $ (2,329) $ (671) $ (3,385)
Add: income impact of assumed conversion of senior common stock 0 0 0 0
Net loss attributable to common stockholders plus assumed conversions $ (384) $ (2,329) $ (671) $ (3,385)
Denominator for basic weighted average shares of common stock (in shares) 27,234,569 23,509,054 25,833,423 22,915,086
Effect of convertible Senior Common Stock (in shares) 0 0 0 0
Denominator for diluted weighted average shares of common stock (in shares) 27,234,569 23,509,054 25,833,423 22,915,086
Diluted loss per share of common stock (in dollars per share) $ (0.01) $ (0.10) $ (0.03) $ (0.15)