Leases - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Jul. 31, 2015	Jun. 30, 2020
Lessee Operating Lease [Line Items]
Remaining rent payments		$ 3,206
Beaverton, Oregon [Member]
Lessee Operating Lease [Line Items]
Existence of option to extend		true
Option to extend operating lease		extend the lease term through March 2024
Option to extend operating lease, month and year	2024-03
Remaining rent payments		$ 3,291
San Mateo, California [Member]
Lessee Operating Lease [Line Items]
Operating lease term, month and year		2020-03