Subsequent Event - Additional Information (Detail) - Subsequent Event - President And Chief Executive Officer $ in Thousands	Apr. 10, 2018 USD ($)
Subsequent Event [Line Items]
Non-disparagement provision period	10 years
Non-solicitation period	2 years
Severance payable	$ 365,000
Description of post employment benefits	In consideration for Mr. Flynn’s entry into the Separation Agreement and Mr. Flynn’s continued compliance with the terms of the Separation Agreement, Mr. Flynn is entitled to receive the following: (i) severance in an amount of $365,000, payable in equal installments on regular payroll dates beginning on the first regular payroll cycle following June 30, 2018 and ending on December 28, 2018, (ii) Company-paid COBRA premiums for Mr. Flynn (and his eligible dependents) until April 9, 2019, subject to Mr. Flynn’s timely election of COBRA continuation coverage, (iii) continued vesting of all of Mr. Flynn’s time-based stock options through April 9, 2020 and an extension of the time to exercise such options through December 31, 2021 and (iv) continued vesting of the time-based restricted stock unit award granted to Mr. Flynn on February 6, 2017 through February 6, 2019 (in the case of (iii) and (iv) subject to immediate vesting upon a change of control). Any unvested stock options following April 9, 2020 will be cancelled and will not vest, and any restricted stock units that are unvested following February 6, 2019 will be canceled and will not vest.