Significant Accounting Policies - Estimated Useful Lives and the Methods of Depreciation for Current and Comparative Periods (Detail)	12 Months Ended
	Dec. 31, 2019
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Basis	Declining balance
Rate	30%
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Basis	Declining balance
Rate	100%
Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Basis	Declining balance
Rate	20%
Leasehold Improvements Initial Lease [Member]
Property, Plant and Equipment [Line Items]
Basis	Straight-line
Lease term or useful life	Shorter of term or useful life
Injection Mold [Member]
Property, Plant and Equipment [Line Items]
Basis	Straight-line
Lease term or useful life	5 years