Leases - Additional Information (Detail) $ in Thousands		3 Months Ended	6 Months Ended
	Jan. 25, 2019 renewal_option	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Cash paid for measurement of operating lease liabilities			$ 1,161
Weighted average remaining lease term		4 years 4 months 24 days	4 years 4 months 24 days
Operating lease expense			$ 1,812	$ 1,263
Fixed lease payment			1,601	1,202
Variable lease payment			211	$ 61
Impairment loss		$ 187	667
Future lease payments		$ 24,362	$ 24,362
Canada, Dollars
Lessee, Lease, Description [Line Items]
Discount rate		4.60%	4.60%
United States of America, Dollars
Lessee, Lease, Description [Line Items]
Discount rate		2.70%	2.70%
BRITISH COLUMBIA | Building
Lessee, Lease, Description [Line Items]
Term of contract	10 years
Number of renewal options | renewal_option	2
Extension term	5 years