Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Business and Summary of Significant Accounting Policies    
Revenue, net $ 3,365 $ 6,541
Components    
Business and Summary of Significant Accounting Policies    
Revenue, net 2,315 5,504
Consumer Audio Products    
Business and Summary of Significant Accounting Policies    
Revenue, net $ 1,050 $ 1,037