v3.25.2
Significant Customers, Concentrations of Credit Risk, and Geographic Information (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
customer
segment
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
customer
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Number of operating segments | segment     1    
Revenue $ 3,414,000 $ 2,898,000 $ 6,078,000 $ 6,022,000  
Allowance for doubtful accounts 46,000   46,000   $ 34,000
Revenue          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Revenue $ 3,414,000 $ 2,898,000 $ 6,078,000 $ 6,022,000  
Revenue | Customer Concentration Risk | Customer A          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Concentration risk (as a percent) 17.00% 16.00% 19.00% 15.00%  
Revenue | Customer Concentration Risk | Customer B          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Concentration risk (as a percent) 13.00% 24.00% 10.00% 20.00%  
Revenue | Geographic Concentration Risk | United States          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Revenue $ 1,728,000 $ 1,403,000 $ 2,830,000 $ 2,848,000  
Revenue | Geographic Concentration Risk | Asia and Middle East          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Revenue 424,000 478,000 793,000 1,207,000  
Revenue | Geographic Concentration Risk | Europe and other          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Revenue 1,262,000 $ 1,017,000 $ 2,455,000 $ 1,967,000  
Accounts receivable | Credit Concentration Risk          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Number of customers | customer     3   1
Accounts receivable | Credit Concentration Risk | Customer One          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Concentration risk (as a percent)     22.00%   41.00%
Accounts receivable | Credit Concentration Risk | Customer Two          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Concentration risk (as a percent)     21.00%    
Accounts receivable | Credit Concentration Risk | Customer Three          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Concentration risk (as a percent)     10.00%    
Assets          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Total long-lived assets 6,086,000   $ 6,086,000   $ 6,217,000
Assets | Geographic Concentration Risk | United States          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Total long-lived assets 1,269,000   1,269,000   1,440,000
Assets | Geographic Concentration Risk | Europe          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Total long-lived assets 4,451,000   4,451,000   4,446,000
Assets | Geographic Concentration Risk | Asia          
Significant Customers, Concentrations of Credit Risk and Geographic Information          
Total long-lived assets $ 366,000   $ 366,000   $ 331,000