Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Inventory reserves	$ 7,300,000	$ 6,500,000
Impairment of intangible assets, finite lived	0		$ 0
Warranty reserve	1,000,000	1,200,000
Advertising costs	$ 9,300,000	4,800,000	3,400,000
Product warranty accrual period	1 year
Standard warranty period	12 months
Stockholders' Equity Attributable to Parent	$ (45,814,000)	(176,962,000)	(306,948,000)	$ (104,151,000)
Accumulated deficit	(809,296,000)	(649,753,000)
Interest Receivable	900,000	800,000
Software and Software Development Costs
Significant Accounting Policies [Line Items]
Capitalized Computer Software, Amortization	1,300,000	300,000
Additional Paid-in Capital
Significant Accounting Policies [Line Items]
Stockholders' Equity Attributable to Parent	(855,694,000)	(827,028,000)	(848,891,000)	$ (535,954,000)
Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Stockholders' Equity Attributable to Parent			51,012,000
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital
Significant Accounting Policies [Line Items]
Stockholders' Equity Attributable to Parent			$ 58,543,000
Software Development
Significant Accounting Policies [Line Items]
Capitalized Computer Software, Amortization	300,000
Capitalized Computer Software, Net	11,800,000	4,000,000
Software and Software Development Costs
Significant Accounting Policies [Line Items]
Capitalized Computer Software, Net	$ 1,900,000	$ 3,200,000
Manufacturing equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	5 years
Prototype Systems
Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	2 years
Capitalized software and computer equipment
Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	3 years
Furniture and fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	5 years
Minimum
Significant Accounting Policies [Line Items]
Extended warranty period	12 months
Maximum
Significant Accounting Policies [Line Items]
Extended warranty period	36 months