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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 | Jan. 01, 2020 $ / shares | Mar. 31, 2019 $ / shares
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Class of Warrant or Right [Line Items] |  |
Fair value (in dollars per share) | $ 17.19 | $ 9.00
Price of Universal Electronics Inc. common stock (in dollars per share) | $ 52.21 | $ 37.46
Risk-free interest rate |  |
Class of Warrant or Right [Line Items] |  |
Valuation assumption rate | 0.0162 | 0.0222
Expected volatility |  |
Class of Warrant or Right [Line Items] |  |
Valuation assumption rate | 0.4886 | 0.4445
Expected life |  |
Class of Warrant or Right [Line Items] |  |
Expected life | 3 years | 3 years 9 months

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