Leases - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) ft² Option	Dec. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Square feet of office space leased | ft²	33,300
Tenant improvements	$ 8,000
Additional tenant improvements	1,500
Cash deposit	900
Tenant improvement allowance receivable reimbursable by the landlord	200
Termination fees for lease termination	500
Operating lease right of use asset	300
Leasehold improvements, gross	200
Operating lease right-of-use assets	9,646	$ 770
Finance lease right-of-use assets	300	$ 300
Irrevocable Letters of Credit [Member]
Lessee Lease Description [Line Items]
Cash deposit	$ 500
USA [Member]
Lessee Lease Description [Line Items]
Lease agreement, commencement date	Jan. 15, 2020
Lease agreement, expiration date	Dec. 01, 2028
Number of option to extend leases | Option	2
Lease agreement option to extend lease term	five-year
Washington [Member]
Lessee Lease Description [Line Items]
Square feet of office space leased | ft²	6,272
Lease agreement, expiration date	Oct. 31, 2021
Amortization of right-of-use assets	$ 300
Reduction in lease obligation	$ 300
Canada [Member]
Lessee Lease Description [Line Items]
Square feet of office space leased | ft²	10,946
Lease agreement, commencement date	Nov. 01, 2016
Lease agreement, expiration date	Oct. 31, 2021
Lease agreement extended period	Oct. 31, 2026