Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Policies - Schedule of net revenue (Details)

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Business and Summary of Significant Accounting Policies - Schedule of net revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Business and Summary of Significant Accounting Policies        
Net revenue $ 345 $ 425 $ 600 $ 894
Components        
Business and Summary of Significant Accounting Policies        
Net revenue 314 313 473 640
Consumer Audio Products        
Business and Summary of Significant Accounting Policies        
Net revenue $ 31 $ 112 $ 127 $ 254