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Net Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Net loss attributable to Clean Energy Fuels Corp. $ (16,293) $ (16,301) $ (34,736) $ (54,998)
Weighted-average common shares outstanding 223,289,936 222,908,402 223,250,123 222,813,286
Dilutive effect of potential common shares from restricted stock units, stock options and stock warrants 0 0 0 0
Weighted-average common shares outstanding - diluted 223,289,936 222,908,402 223,250,123 222,813,286
Basic loss per share (in dollars per share) $ (0.07) $ (0.07) $ (0.16) $ (0.25)
Diluted loss per share (in dollars per share) $ (0.07) $ (0.07) $ (0.16) $ (0.25)