Condensed Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net (loss) income	$ (2,704)	$ 4,646
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	795	617
Gain on sale of property and equipment		(15)
Stock-based compensation	3,576	2,420
Loss on prepayment and termination of credit facility		170
Non-cash warrant revaluation		23
Non-cash interest expense		26
Changes in operating assets and liabilities:
Accounts receivable	1,440	1,639
Inventory	404	(662)
Prepaid expenses and other current assets	471	193
Other assets	1
Accounts payable	(595)	(741)
Accrued liabilities	(2,628)	(701)
Deferred revenue	(336)	(96)
Lease liabilities, net	4	12
Net cash provided by operating activities	428	7,531
Cash flows from investing activities
Purchases of property and equipment	(1,239)	(1,063)
Proceeds received from sale of property and equipment		15
Net cash used in investing activities	(1,239)	(1,048)
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	629	342
Net cash provided by (used in) financing activities	629	(2,448)
Net (decrease) increase in cash and cash equivalents	(182)	4,035
Cash and cash equivalents at beginning of period	36,946	26,795
Cash and cash equivalents at end of period	36,764	30,830
Supplementary cash flow information:
Interest paid		37
Operating cash flows paid for operating leases	699	692
Financing cash flows paid for finance leases	28	$ 6
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	$ 75