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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
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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

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