Summary of Significant Accounting Policies - Additional Information (Detail) - Accounting Standards Update 2016-09 [Member] $ in Thousands	Apr. 01, 2017 USD ($)
Deferred Tax Asset [Member]
Accounting Policies [Line Items]
Cumulative effect adjustment increase (decrease) due to adoption of ASU	$ 84
Additional Paid-In Capital [Member]
Accounting Policies [Line Items]
Cumulative effect adjustment increase (decrease) due to adoption of ASU	426
Accumulated Deficit [Member]
Accounting Policies [Line Items]
Cumulative effect adjustment increase (decrease) due to adoption of ASU	$ (342)