Significant Customers, Concentrations of Credit Risk, and Geographic Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment customer	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) customer
Significant Customers, Concentrations of Credit Risk and Geographic Information
Number of operating segments \| segment			1
Revenue	$ 2,959,000	$ 2,671,000	$ 9,037,000	$ 8,693,000
Allowance for doubtful accounts	49,000		49,000		$ 34,000
Revenue
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	$ 2,959,000	$ 2,671,000	$ 9,037,000	$ 8,693,000
Revenue \| Customer Concentration Risk \| Customer A
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)	21.00%	10.00%	20.00%	13.00%
Revenue \| Customer Concentration Risk \| Customer B
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)	11.00%		11.00%	14.00%
Revenue \| Geographic Concentration Risk \| United States
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	$ 1,086,000	$ 1,056,000	$ 3,916,000	$ 3,904,000
Revenue \| Geographic Concentration Risk \| Asia and Middle East
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	658,000	775,000	1,451,000	1,982,000
Revenue \| Geographic Concentration Risk \| Europe and other
Significant Customers, Concentrations of Credit Risk and Geographic Information
Revenue	1,215,000	$ 840,000	$ 3,670,000	$ 2,807,000
Accounts receivable \| Credit Concentration Risk
Significant Customers, Concentrations of Credit Risk and Geographic Information
Number of customers \| customer			1		1
Accounts receivable \| Credit Concentration Risk \| Customer One
Significant Customers, Concentrations of Credit Risk and Geographic Information
Concentration risk (as a percent)			33.00%		41.00%
Assets
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	5,675,000		$ 5,675,000		$ 6,217,000
Assets \| Geographic Concentration Risk \| United States
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	1,189,000		1,189,000		1,440,000
Assets \| Geographic Concentration Risk \| Europe
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	4,154,000		4,154,000		4,446,000
Assets \| Geographic Concentration Risk \| Asia
Significant Customers, Concentrations of Credit Risk and Geographic Information
Total long-lived assets	$ 332,000		$ 332,000		$ 331,000

INTERLINK ELECTRONICS INC 10-Q