Net Loss per Share - Computation of Denominators Used in Net Loss per Share (Detail) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Basic: | |||
| Weighted average shares outstanding | 27,279,008 | 24,620,372 | 20,965,935 |
| Diluted: | |||
| Weighted average shares outstanding - Basic | 27,279,008 | 24,620,372 | 20,965,935 |
| Common stock options | 0 | 0 | 0 |
| Denominator for diluted net loss per share | 27,279,008 | 24,620,372 | 20,965,935 |