Goodwill and Intangible Assets - Summary Of Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill, Beginning Balance	$ 12,026
Goodwill, Ending Balance	12,026	$ 12,026
Intangible Assets, Beginning Balance	4,110
Intangible Assets, Amortization expense	(457)	(250)
Intangible Assets, Ending Balance	5,653	4,110
Rhythm Xience [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill, Acquisition		12,026
Intangible Assets, Acquisition		4,360
Intangible Assets, Amortization expense		$ (200)
Biotronik Asset Acquisition [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible Assets, Acquisition	$ 2,000