CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash flows from operating activities
Net loss	$ (8,939)	$ (10,904)	$ (11,206)	$ (11,125)	$ (19,843)	$ (22,331)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation					13,428	12,192
Depreciation and amortization					2,081	2,322
Accounts receivable credit losses					240	103	$ 761
Amortization of discount and premium on marketable securities					(3,019)	(1,249)
Inventory reserve					366	159
Amortization of debt issuance costs					85	123
Loss on disposal of property and equipment					819	340
Changes in operating assets and liabilities:
Accounts receivable					(3,022)	88
Inventory					(3,314)	(3,452)
Prepaid expenses and other assets					399	262
Accounts payable					1,828	(7)
Accrued liabilities and other					(3,953)	(2,893)
Net cash used in operating activities					(13,905)	(14,343)
Cash flows from investing activities
Maturities of marketable securities					119,000	69,000
Purchases of marketable securities					(109,288)	(49,723)
Purchases of property and equipment					(5,195)	(5,293)
Net cash provided by investing activities					4,517	13,984
Cash flows from financing activities
Proceeds from public offering, net of discounts, commissions and offering costs					0	84,137
Proceeds from debt financing					0	36,000
Repayments of debt financing					0	(35,275)
Payments of debt issuance costs					0	(40)
Proceeds from issuance of common stock under employee stock purchase plan					1,472	1,471
Proceeds from the exercise of stock options					409	4,035
Net cash provided by financing activities					1,881	90,328
Effect of exchange rate changes on cash and cash equivalents					(187)	129
Net increase (decrease) in cash and cash equivalents					(7,694)	90,098
Cash and cash equivalents at
Beginning of period		$ 33,271		$ 20,717	33,271	20,717	20,717
End of period	$ 25,577		$ 110,815		25,577	110,815	$ 33,271
Supplemental disclosure of non-cash information
Unpaid purchases of property and equipment					1,293	510
Public offering costs included in accounts payable					$ 0	$ 465