Preferred Stock, Common Stock and Stockholders' Equity - Summary of Warrants Activity (Detail) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Equity [Abstract] | ||
| Shares, Outstanding beginning balance | 118,881 | |
| Shares, Outstanding ending balance | 118,881 | 118,881 |
| Weighted Average Exercise Price, Outstanding beginning balance | $ 16.73 | |
| Weighted Average Exercise Price, Outstanding ending balance | $ 16.73 | $ 16.73 |
| Weighted Average Remaining Contractual Term (Years), Outstanding | 4 years 4 months 6 days | 5 years 4 months 6 days |