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Acquisitions - Fair value of consideration (Details) - USD ($) $ in Thousands | Jun. 22, 2020 | Jun. 18, 2020
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Giner ELX, Inc |  |
Cash | $ 25,820 |
Plug Power Stock | 19,263 |
Contingent consideration | 7,790 |
Total consideration | $ 52,873 |
United Hydrogen Group Inc |  |
Cash |  | $ 19,293
Plug Power Stock |  | 30,410
Contingent consideration |  | 1,110
Total consideration |  | $ 50,813

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