Select Balance Sheet and Statement of Operations Information - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Lab equipment tooling and molds	$ 8,050	$ 7,872
Office furniture and equipment	1,714	1,710
Leasehold improvements	1,725	1,950
Computers and software	1,786	1,811
Vehicles	12	16
Total property and equipment	13,287	13,359
Less: Accumulated depreciation	(9,560)	(8,711)
Total property and equipment, net	$ 3,727	$ 4,648
Lab Equipment Tooling and Molds \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P4Y
Lab Equipment Tooling and Molds \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P10Y
Office Furniture and Equipment \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P6Y
Office Furniture and Equipment \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P10Y
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P10Y
Computers and Software
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P3Y
Vehicles \| Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P5Y
Vehicles \| Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Useful lives	P7Y

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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Vehicles gross.

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