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Significant Customers, Concentrations of Credit Risk, and Geographic Information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($) customer segment	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) customer
Significant Customers, Concentrations of Credit Risk and Geographic Information
Number of operating segments | segment	1
Revenue	$ 2,664,000	$ 3,124,000
Allowance for doubtful accounts	40,000		$ 34,000
Revenue
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	$ 2,664,000	$ 3,124,000
Revenue | Customer Concentration Risk | Customer A
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)	22.00%	17.00%
Revenue | Customer Concentration Risk | Customer B
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)		16.00%
Revenue | Geographic Concentration Risk | United States
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	$ 1,102,000	$ 1,445,000
Revenue | Geographic Concentration Risk | Asia and Middle East
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	369,000	729,000
Revenue | Geographic Concentration Risk | Europe and other
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	$ 1,193,000	$ 950,000
Accounts receivable | Credit Concentration Risk
Significant Customers, Concentrations of Credit Risk and Geographic Information
Number of customers | customer	2		1
Accounts receivable | Credit Concentration Risk | Customer One
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)	36.00%		41.00%
Accounts receivable | Credit Concentration Risk | Customer Two
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)	11.00%
Assets
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	$ 6,078,000		$ 6,217,000
Assets | Geographic Concentration Risk | United States
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	1,348,000		1,440,000
Assets | Geographic Concentration Risk | Europe
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	4,393,000		4,446,000
Assets | Geographic Concentration Risk | Asia
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	$ 337,000		$ 331,000

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