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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Aug. 05, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]          
Warranty accrual, beginning balance $ 534 $ 589 $ 472 $ 639  
Warranty costs accrued 210 54 444 114  
Settlements of warranty claims (162) (113) (334) (223)  
Warranty accrual, ending balance $ 582 $ 530 $ 582 $ 530  
Merger of VTB Holdings, Inc. and Parametric Sound Corporation | VTB Holdings, Inc          
Business Acquisition [Line Items]          
Ownership percentage         80.00%
Merger of VTB Holdings, Inc. and Parametric Sound Corporation | Parametric Sound Corporation          
Business Acquisition [Line Items]          
Ownership percentage         20.00%