Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Activities
Net (loss) income	$ (739)	$ 281
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Depreciation	164	80
Amortization	9	16
Non-cash interest income on held-to-maturity securities	(50)	(9)
Stock-based compensation, net of forfeitures	110	104
Changes in operating assets and liabilities:
Accounts receivable	3,768	1,250
Employee retention credit receivable	0	(1,677)
Inventory	(137)	(99)
Prepaid expenses, other current assets and other non-current assets	(28)	151
Accounts payable	(1,340)	(563)
Accrued liabilities and other non-current liabilities	(249)	(609)
Net cash provided by (used in) operating activities	1,508	(1,075)
Investing Activities
Purchases of equipment and patents	(65)	(114)
Purchases of debt securities	(993)	(7,641)
Maturities of debt securities	2,750	2,750
Net cash provided by (used in) investing activities	1,692	(5,005)
Financing Activities
Taxes paid on behalf of equity award participants	(24)	0
Net cash used in financing activities	(24)	0
Effect of exchange rate fluctuations on cash	135	(116)
Net increase (decrease) in cash and cash equivalents	3,311	(6,196)
Cash and cash equivalents at beginning of period	8,510	17,578
Cash and cash equivalents at end of period	$ 11,821	$ 11,382