Organization and Description of Business - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 6 Months Ended | |
---|---|---|---|
Jul. 31, 2015 |
Feb. 28, 2015 |
Jun. 30, 2015 |
|
Organization And Description Of Business [Line Items] | |||
Entity incorporation state | Delaware | ||
Entity incorporation date | Aug. 01, 2012 | ||
Net proceeds from sale of common stock | $ 69,487 | ||
Follow-on Offering | |||
Organization And Description Of Business [Line Items] | |||
Common stock, shares issued | 4,147,358 | ||
Shares issued, price per share | $ 18.00 | ||
Net proceeds from sale of common stock | $ 69,500 | ||
Follow-on Offering | Subsequent Event | |||
Organization And Description Of Business [Line Items] | |||
Common stock, shares issued | 3,980,768 | ||
Shares issued, price per share | $ 52.00 | ||
Net proceeds from sale of common stock | $ 193,900 |