CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 99,448	$ 108,977
Short-term investments	129,722	29,528
Accounts receivable, net of allowance of $1,335 and $1,205 as of December 31, 2020 and 2021, respectively	87,433	61,784
Other receivables	24,447	23,655
Inventory	31,302	28,100
Prepaid expenses and other current assets	37,584	9,404
Derivative assets, related party		1,591
Total current assets	409,936	263,039
Operating lease right-of-use assets	42,537	25,967
Land, property and equipment, net	261,761	290,911
Restricted cash	7,008	11,000
Notes receivable and other long-term assets, net	56,189	27,299
Long-term portion of derivative assets, related party		4,057
Investments in other entities	109,811	27,962
Goodwill	64,328	64,328
Intangible assets, net	5,500	464
Total assets	957,070	715,027
Current liabilities:
Current portion of debt	12,845	3,592
Current portion of finance lease obligations	846	840
Current portion of operating lease obligations	3,551	2,822
Accounts payable	24,352	17,310
Accrued liabilities	75,159	52,637
Deferred revenue	7,251	2,642
Derivative liabilities, related party	1,900
Total current liabilities	125,904	79,843
Long-term portion of debt	23,215	82,088
Long-term portion of finance lease obligations	2,427	2,552
Long-term portion of operating lease obligations	39,431	23,698
Long-term portion of derivative liabilities, related party	2,483
Other long-term liabilities	8,199	3,996
Total liabilities	201,659	192,177
Commitments and contingencies (Note 17)
Stockholders' equity:
Preferred stock, $0.0001 par value. 1,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.0001 par value. 304,000,000 and 454,000,000 shares authorized; 198,491,204 shares and 222,684,923 shares issued and outstanding as of December 31, 2020 and 2021, respectively	22	20
Additional paid-in capital	1,519,918	1,191,791
Accumulated deficit	(771,242)	(678,096)
Accumulated other comprehensive loss	(1,622)	(209)
Total Clean Energy Fuels Corp. stockholders' equity	747,076	513,506
Noncontrolling interest in subsidiary	8,335	9,344
Total stockholders' equity	755,411	522,850
Total liabilities and stockholders' equity	$ 957,070	$ 715,027