Performance-Based Common Stock Warrants - Assumptions Used in Valuation and Weighted Average Fair Value of Warrants (Details) - Common Stock Purchase Warrants	Jun. 30, 2018 $ / shares	Jun. 30, 2017 $ / shares
Class of Warrant or Right [Line Items]
Fair value (in dollars per share)	$ 6.92	$ 28.89
Price of Universal Electronics Inc. common stock (in dollars per share)	$ 32.875	$ 67.210
Measurement Input, Risk Free Interest Rate [Member]
Class of Warrant or Right [Line Items]
Risk-free interest rate	0.0271	0.0195
Measurement Input, Price Volatility [Member]
Class of Warrant or Right [Line Items]
Risk-free interest rate	0.4020	0.3505
Measurement Input, Expected Term [Member]
Class of Warrant or Right [Line Items]
Expected life	4 years 6 months	5 years 6 months