Condensed Statement of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net (loss) income	$ (433)	$ 7,084
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,197	905
Gain on sale of property and equipment		(15)
Stock-based compensation	5,108	3,700
Loss on prepayment and termination of credit facility		170
Non-cash warrant revaluation		(25)
Non-cash interest expense		26
Changes in operating assets and liabilities:
Accounts receivable	147	577
Inventory	(50)	(1,954)
Prepaid expenses and other current assets	(3,597)	366
Other assets	(88)
Accounts payable	236	599
Accrued liabilities	(2,248)	(54)
Deferred revenue	36	(311)
Contract obligations	2,953
Lease liabilities, net	5	18
Net cash provided by operating activities	3,266	11,086
Cash flows from investing activities
Purchases of property and equipment	(1,302)	(1,080)
Proceeds received from sale of property and equipment		15
Net cash used in investing activities	(1,302)	(1,065)
Cash flows from financing activities
Payments on long-term debt		(2,790)
Proceeds from exercise of stock options and purchase of shares in employee stock purchase plan	678	908
Net cash provided by (used in) financing activities	678	(1,882)
Net increase in cash and cash equivalents	2,642	8,139
Cash and cash equivalents at beginning of period	36,946	26,795
Cash and cash equivalents at end of period	39,588	34,934
Supplementary cash flow information:
Interest paid		37
Operating cash flows paid for operating leases	1,049	1,038
Financing cash flows paid for finance leases	47	$ 9
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for finance lease liabilities	297
Purchases of property and equipment in accounts payable and accrued liabilities	$ 36