Quarterly report [Sections 13 or 15(d)]

Related Parties (Details)

v3.25.3
Related Parties (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Related Parties          
Issuance of common stock for the acquisition of CSI (shares)         40,000,000
Interest income     $ 5,000    
Net revenue $ 2,904,000 $ 1,172,000 5,268,000 $ 1,772,000  
Other liabilities 648,000   $ 648,000   $ 553,000 [1]
Related Party [Member] | EOS Holdings          
Related Parties          
Issuance of common stock for the acquisition of CSI (shares)     3,999,911    
Due to related party 160,000   $ 160,000    
Interest income     5,000    
Revenue of related parties owned 160,000   661,000    
Related Party [Member] | EOS Holdings | DV Convertible Note          
Related Parties          
Due to related party 4,600,000   $ 4,600,000    
Outstanding principal converted $ 3,200,000        
Helge Kristensen | Warrant          
Related Parties          
Ownership percentage 1.00%   1.00%   1.00%
Hansong Technology | Sales of Modules To Related Party          
Related Parties          
Net revenue $ 14,000 3,000 $ 51,000 38,000  
Payments for purchases 681,000 38,000 681,000 38,000  
Amount due from related parties 0 4,000 0 4,000  
Deposit liability 605,000   605,000    
Hansong Technology | Purchase of speaker products from related party          
Related Parties          
Payments for purchases 48,000 96,000 50,000 184,000  
Purchase of wireless audio speaker systems from related party 5,000 0 6,000 1,000  
Other liabilities $ 0 $ 67,000 $ 0 $ 67,000  
[1] The condensed consolidated balance sheet as of December 31, 2024 was derived from the audited consolidated balance sheet as of that date.