Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities
Net income	$ 781	$ 9,052
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,731	1,205
Gain on sale of property and equipment		(15)
Stock-based compensation	6,713	5,005
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	(168)	(889)
Inventory	(719)	(1,708)
Prepaid expenses and other current assets	(284)	(384)
Other assets	(492)	(150)
Accounts payable	(374)	499
Accrued liabilities	(1,939)	803
Deferred revenue	(258)	(485)
Contract obligations	2,034
Lease liabilities, net	74	24
Net cash provided by operating activities	7,099	13,128
Cash flows from investing activities
Purchases of property and equipment	(3,049)	(1,404)
Purchase of intangible assets	(11)
Proceeds received from sale of property and equipment		19
Net cash used in investing activities	(3,060)	(1,385)
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	1,178	1,198
Payments on finance leases	(66)	(12)
Net cash provided by (used in) financing activities	1,112	(1,592)
Net increase in cash and cash equivalents	5,151	10,151
Cash and cash equivalents at beginning of period	36,946	26,795
Cash and cash equivalents at end of period	42,097	36,946
Supplementary cash flow information:
Interest paid		37
Cash paid for taxes	202
Operating cash flows paid for operating leases	1,399	1,384
Financing cash flows paid for finance leases	66	12
Non-cash investing and financing activities:
Internal-use software asset obtained in exchange for software liabilities	3,564
Right-of-use assets obtained in exchange for finance lease liabilities	297
Purchases of property and equipment in accounts payable and accrued liabilities	$ 182	446
Cashless exercise of warrants		$ 2