Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (13,454)	$ (9,036)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization expense	924	334
Provision for allowance for doubtful accounts	38	30
Share-based compensation expense	2,692	1,409
Non-Cash Lease Expense	626	336
Amortization of debt issuance costs	74	45
Recovery of loss reserve for surgical instruments	(23)	0
Gain on fair value adjustment to derivative liability	0	(90)
Accretion (amortization) of discount (premium) on marketable securities, net	(297)	0
Net changes in operating assets and liabilities:
Accounts Receivable	3,793	2,542
Inventory	(3,189)	(551)
Prepaid expenses and other assets	(963)	1,233
Other non-current assets	69	134
Payable to broker for unsettled marketable security purchases	710	0
Operating lease liabilities	(478)	(133)
Accounts payable	(3,592)	(607)
Accrued liabilities	(4,076)	(2,619)
Other, net	25	0
Net cash used in operating activities	(17,259)	(7,241)
Cash flows from investing activities
Purchases of available-for-sale marketable securities	(99,550)	0
Maturities of available-for-sale marketable securities	20,548	0
Purchases of property and equipment	(1,478)	(1,481)
Net cash used in investing activities	(80,480)	(1,481)
Cash flows from financing activities
Proceeds from issuance of common stock upon initial public offering, net of issuance costs and underwriting fees of $0.6 million	107,527	0
Proceeds from exercise of employee stock options	352	1,372
Net cash provided by financing activities	107,879	1,372
Net (decrease) increase in cash and cash equivalents	10,140	(7,350)
Cash and cash equivalents at beginning of period	19,473	105,833
Cash and cash equivalents at end of period	29,613	98,483
Supplemental disclosure of cash flow information:
Cash paid for interest	1,285	951
Operating lease right-of-use assets obtained in exchange for new lease liabilities	0	15,300
Operating lease right-of-use asset and lease liability adjustment due to lease incentive	(35)	0
Unrealized losses on marketable securities	$ 29	$ 0