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Acquisitions - Fair value of consideration (Details) - USD ($)
$ in Thousands
Jun. 22, 2020
Jun. 18, 2020
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