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Performance-Based Common Stock Warrants - Assumptions Used in Valuation and Weighted Average Fair Value of Warrants (Details) - Common Stock Purchase Warrants
Jun. 30, 2019
$ / shares
Jun. 30, 2018
$ / shares
Class of Warrant or Right [Line Items]    
Fair value (in dollars per share) $ 10.61 $ 6.92
Price of Universal Electronics Inc. common stock (in dollars per share) $ 40.69 $ 32.88
Risk-free interest rate    
Class of Warrant or Right [Line Items]    
Valuation assumption rate 0.0172 0.0271
Expected volatility    
Class of Warrant or Right [Line Items]    
Valuation assumption rate 0.4632 0.4020
Expected life    
Class of Warrant or Right [Line Items]    
Expected life 3 years 6 months 4 years 6 months