Summary of Significant Accounting Policies -Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Surgical instrument expense		$ 2,000,000	$ 900,000
Number of reportable segment | Segment	1
Net of an allowance for doubtful accounts	$ 1,000,000	700,000
Provision for bad debts	434,000	411,000	144,000
Capitalized software development cost	200,000
Revenue recognition international sales	$ 0
Revenue recognition shipments to customers right to return description	shipments to customers, the Company offers the right to return the product within 30 days for a full refund, and for returns between 30 and 90 days, the Company offers a full refund less a 15% restocking fee. The Company does not have a history of product returns for refund. Customer invoices are generally payable within 30 days. The Company's products are generally sold with a limited standard warranty to the original purchaser of the products against defects in workmanship and materials for 180 days. The Company's liability is limited to providing, at the Company's option, a full refund or credit of the purchase price, or repairing or replacing the product, provided that the customer returns the defective product within 180 days from the purchase date. To date, the Company has had negligible returns of any products alleged to be defective.
Contract with customer, refund liability	$ 0	0
Contract with customer, product returns			0
Practical expedient, incremental cost of obtaining contract	true
Shipping and handling costs	$ 1,300,000	800,000	500,000
Advertising costs	16,100,000	15,000,000	$ 13,000,000
Liability related to uncertain tax positions	0
Accruals for product liability	$ 0	$ 0
Expected dividend yield	0.00%	0.00%	0.00%
Comprehensive loss	$ (49,337,000)	$ (42,842,000)	$ (20,748,000)
Obsolescence [Member]
Summary Of Significant Accounting Policies [Line Items]
Provision for inventory obsolescence	$ 900,000	$ 100,000	$ 300,000
Maximum [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%
Minimum [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%