Intangible Assets - Summary Of Composition Of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 680	$ 673
Finite Lived Intangible Assets, Accumulated Amortization	(264)	(230)
Finite Lived Intangible Assets, Net Carrying Amount	366
Intangible Assets, Net (Excluding Goodwill)	416	443
Trademarks
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 50	50
Patent 1
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Finite Lived Intangible Assets, Gross Amount	$ 211	209
Finite Lived Intangible Assets, Accumulated Amortization	(210)	(182)
Finite Lived Intangible Assets, Net Carrying Amount	$ 1	27
Patent 2
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years
Finite Lived Intangible Assets, Gross Amount	$ 128	123
Finite Lived Intangible Assets, Accumulated Amortization	(19)	(18)
Finite Lived Intangible Assets, Net Carrying Amount	$ 109	105
Patent 3
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	14 years
Finite Lived Intangible Assets, Gross Amount	$ 192	192
Finite Lived Intangible Assets, Accumulated Amortization	(28)	(25)
Finite Lived Intangible Assets, Net Carrying Amount	$ 164	167
Patent 5
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Finite Lived Intangible Assets, Gross Amount	$ 46	46
Finite Lived Intangible Assets, Accumulated Amortization	(4)	(3)
Finite Lived Intangible Assets, Net Carrying Amount	$ 42	43
Patent 6
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Finite Lived Intangible Assets, Gross Amount	$ 39	39
Finite Lived Intangible Assets, Accumulated Amortization	(3)	(2)
Finite Lived Intangible Assets, Net Carrying Amount	$ 36	37
Patent 7
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years
Finite Lived Intangible Assets, Gross Amount	$ 2	2
Finite Lived Intangible Assets, Net Carrying Amount	$ 2	2
Patent 8
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Finite Lived Intangible Assets, Gross Amount	$ 3	3
Finite Lived Intangible Assets, Net Carrying Amount	$ 3	3
Patent 10
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	19 years
Finite Lived Intangible Assets, Gross Amount	$ 3	3
Finite Lived Intangible Assets, Net Carrying Amount	$ 3	3
Patent 11
Schedule Of Intangible Assets Excluding Goodwill [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	19 years
Finite Lived Intangible Assets, Gross Amount	$ 6	6
Finite Lived Intangible Assets, Net Carrying Amount	$ 6	$ 6