Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives (Detail)	12 Months Ended
	Jan. 31, 2021
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	7 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Computer Software, Intangible Asset [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Computer Software, Intangible Asset [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Tooling [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Tooling [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	Shorter of the estimated lease term or useful life