Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (65,765)	$ (60,513)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment of acquired contract intangible asset	0	3,724
Share-based compensation expense	11,954	9,643
Amortization of premiums and discounts on short-term investments, net	(3,136)	(1,215)
Non-cash interest expense	58	0
Non-cash lease expense	461	382
Depreciation and amortization expense	169	159
Changes in operating assets and liabilities:
Accounts receivable	(3,626)	(1,862)
Inventory	(3,265)	(1,861)
Prepaid expenses and other current assets	3,603	(1,463)
Other non-current assets	518	437
Operating lease liabilities, net	(502)	(291)
Accounts payable and accrued liabilities	(132)	3,220
Net cash used in operating activities	(59,663)	(49,640)
Investing activities:
Purchases of property and equipment	(3,972)	(444)
Purchases of short-term investments	(64,439)	(145,192)
Maturities of short-term investments	151,617	12,750
Net cash provided by (used in) investing activities	83,206	(132,886)
Financing activities:
Proceeds from issuance of common stock and prefunded warrants to PIPE Investors	0	72,500
Issuance of common stock upon exercise of stock options	78	401
Proceeds from issuance under employee stock purchase plan	408	323
Issuance of common stock upon exercise of warrants	0	55
Deferred offering costs paid for financing	(160)	(337)
Costs incurred in connection with issuance of common stock	0	(322)
Net cash provided by financing activities	326	72,620
Net increase (decrease) in cash, cash equivalents and restricted cash	23,869	(109,906)
Cash, cash equivalents and restricted cash at beginning of year	39,083	148,989
Cash, cash equivalents and restricted cash at end of year	62,952	39,083
Supplemental disclosure of cash flow information:
Interest paid during the period	230	230
Costs incurred in connection with issuance of common stock paid during the period	0	322
Supplemental disclosure of non-cash activities:
Deferred transaction costs included in accounts payable and accrued liabilities	46	0
Amounts accrued for purchases of property and equipment	571	80
Right-of-use assets obtained in exchange for operating lease liabilities	$ 0	$ 1,241