CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash, cash equivalents and current portion of restricted cash	$ 49,222	$ 30,624
Short-term investments	56,929	65,646
Accounts receivable, net of allowance for doubtful accounts of $1,919 and $2,412 as of December 31, 2018 and 2019, respectively	61,760	68,865
Other receivables	84,898	15,544
Inventory	29,874	34,975
Prepaid expenses and other current assets	11,109	8,444
Derivative assets, related party		1,508
Total current assets	293,792	225,606
Operating lease right-of-use assets	28,627
Land, property and equipment, net	323,912	350,568
Long-term portion of restricted cash	4,000	4,000
Notes receivable and other long-term assets, net	31,622	17,470
Long-term portion of derivative assets, related party	3,270	8,824
Investments in other entities	26,305	26,079
Goodwill	64,328	64,328
Intangible assets, net	1,229	2,207
Total assets	777,085	699,082
Current liabilities:
Current portion of debt	56,013	4,712
Current portion of finance lease obligations	615	693
Current portion of operating lease obligations	3,359
Accounts payable	27,376	19,024
Accrued liabilities	67,697	48,469
Deferred revenue	7,338	7,361
Derivative liabilities, related party	164
Total current liabilities	162,562	80,259
Long-term portion of debt	32,872	75,003
Long-term portion of finance lease obligations	2,715	3,776
Long-term portion of operating lease obligations	26,206
Other long-term liabilities	9,701	15,035
Total liabilities	234,056	174,073
Commitments and contingencies (Note 16)
Stockholders' equity:
Common stock, $0.0001 par value. 304,000,000 shares authorized; 203,599,892 shares and 204,723,055 shares issued and outstanding as of December 31, 2018 and 2019, respectively	20	20
Additional paid-in capital	1,203,186	1,198,769
Accumulated deficit	(668,232)	(688,653)
Accumulated other comprehensive loss	(1,566)	(2,138)
Total Clean Energy Fuels Corp. stockholders’ equity	533,408	507,998
Noncontrolling interest in subsidiary	9,621	17,011
Total stockholders’ equity	543,029	525,009
Total liabilities and stockholders’ equity	$ 777,085	$ 699,082