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 | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Calculation of basic loss per share of common stock: | |||||||||||
| Net loss attributable to common stockholders | $ (4,265) | $ (384) | $ (2,025) | $ 1,735 | $ (312) | $ (2,329) | $ (631) | $ (426) | $ (4,939) | $ (3,698) | $ (1,505) |
| Denominator for basic weighted average shares of common stock (in shares) | 26,358,237 | 23,193,962 | 21,159,597 | ||||||||
| Basic loss per share of common stock (in dollars per share) | $ (0.19) | $ (0.16) | $ (0.07) | ||||||||
| Calculation of diluted loss per share of common stock: | |||||||||||
| Net loss attributable to common stockholders | $ (4,265) | $ (384) | $ (2,025) | $ 1,735 | $ (312) | $ (2,329) | $ (631) | $ (426) | $ (4,939) | $ (3,698) | $ (1,505) |
| Net loss attributable to common stockholders plus assumed conversions | $ (4,939) | $ (3,698) | $ (1,505) | ||||||||
| Denominator for basic weighted average shares of common stock (in shares) | 26,358,237 | 23,193,962 | 21,159,597 | ||||||||
| Effect of convertible senior common stock (in shares) | 0 | 0 | 0 | ||||||||
| Denominator for diluted weighted average shares of common stock (in shares) | 26,358,237 | 23,193,962 | 21,159,597 | ||||||||
| Diluted loss per share of common stock (in dollars per share) | $ (0.19) | $ (0.16) | $ (0.07) | ||||||||
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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