Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
OPERATING ACTIVITIES
Net loss	$ (2,324)	$ (1,943)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	663	403
Amortization	36	57
Loss on disposal of equipment	2	0
Non-cash interest income on held-to-maturity securities	(62)	(132)
Provision for credit losses, net of recoveries	0	(4)
Deferred income taxes	11	4
Stock-based compensation, net of forfeitures	326	446
Changes in operating assets and liabilities:
Accounts receivable	2,518	(1,127)
Employee retention credit receivable	1,677	(1,677)
Inventories	26	41
Prepaid expenses, other current assets and other non-current assets	(172)	292
Accounts payable	258	519
Accrued liabilities and other non-current liabilities	57	(312)
Net cash provided by (used in) operating activities	3,016	(3,433)
INVESTING ACTIVITIES
Purchases of equipment, patents, and other intangible assets	(674)	(378)
Purchases of debt securities	(12,031)	(18,060)
Maturities of debt securities	13,250	12,995
Net cash provided by (used in) investing activities	545	(5,443)
FINANCING ACTIVITIES
Taxes paid on behalf of equity award participants	(222)	(95)
Net cash used in financing activities	(222)	(95)
Net increase (decrease) in cash and cash equivalents	3,429	(9,068)
Cash and cash equivalents at beginning of period	8,510	17,578
Cash and cash equivalents at end of period	11,939	8,510
Effect of exchange rate fluctuations on cash	90	(97)
Supplemental Cash Flow Information:
Cash income taxes paid, net	11	52
Non-cash transfer from other non-current assets to property and equipment	$ 0	$ 597