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Fair Value Measurements (Details) - Schedule of roll forward of the Company’s Level 3 instruments - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of roll forward of the Company’s Level 3 instruments [Abstract]      
Beginning balance $ 145,144    
Fair value adjustments- Contingent consideration 24 $ 796 $ 83
Obligation to issue shares of common stock to sellers of World Energy 1,526    
Settlement of derivative liability upon exercise of warrants (47,162)    
Settlement of derivative liability upon call of warrants (591)    
Fair value adjustments- Warrant liability (74,731) (2,889) $ 819
Fair value adjustments – World Energy 514    
Earnout – World Energy 1,000    
Ending balance $ 25,724 $ 145,144