Redeemable Convertible Preferred Stock and Equity (Deficit) - Employee Stock Purchase Plan - Additional information (Detail) - shares |
1 Months Ended | 12 Months Ended | |
---|---|---|---|
Sep. 30, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
Number of common stock reserved for issuance | 81,119,000 | 81,164,000 | |
2014 Employee Stock Purchase Plan [Member] | |||
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
Purchase of common stock shares at discount | 15.00% | ||
Percentage of fair value exercise price grant date | 85.00% | ||
Number of common stock reserved for issuance | 1,600,000 | ||
Common stock reserved for future issuance, Description | The Company has reserved 1,600,000 shares of its common stock for issuance under the 2014 Purchase Plan and shares reserved for issuance will increase January 1 of each year commencing January 1, 2016 by the lesser of (i) a number of shares equal to 1% of the total number of outstanding shares of common stock on December 31 immediately prior to the date of increase; (ii) 1,200,000 shares or (iii) such number of shares as may be determined by the board of directors. | ||
Percentage of common stock reserved for future issuance | 1.00% | ||
Increase in number of shares of common stock reserved for future issuance, shares | 1,200,000 | ||
Number of common stock repurchased | 315,385 | 0 |