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5. Variable Interest Entity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Current assets: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 919 |  |  | $ 68 |  |  | $ 919 | $ 68 | $ 1,188 | $ 428
Prepaid expenses | 558 |  |  |  |  |  | 558 |  | 942 |
Other assets | 2,186 |  |  |  |  |  | 2,186 |  | 956 |
Total current assets | 12,605 |  |  |  |  |  | 12,605 |  | 10,311 |
Property, plant and equipment, net | 80,843 |  |  |  |  |  | 80,843 |  | 78,492 |
Total assets | 96,683 |  |  |  |  |  | 96,683 |  | 91,821 |
Liabilities and stockholder deficit |  |  |  |  |  |  |  |  |  |
Accumulated deficit | (222,195) |  |  |  |  |  | (222,195) |  | (193,204) |
Total liabilities and stockholder's deficit | 96,683 |  |  |  |  |  | 96,683 |  | 91,821 |
Selling, general and administrative expenses | 4,529 |  |  | 3,893 |  |  | 12,715 | 11,289 |  |
Operating loss | (584) |  |  | (1,299) |  |  | (5,971) | (4,178) |  |
Interest expense |  |  |  |  |  |  |  |  |  |
Interest rate expense | 5,396 |  |  | 4,692 |  |  | 15,572 | 13,395 |  |
Debt related fees and amortization expense | 946 |  |  | 719 |  |  | 3,565 | 6,395 |  |
Other income | (289) |  |  | (61) |  |  | (1,001) | 2 |  |
Net loss | (7,226) | $ (13,930) | $ (10,667) | (6,649) | $ (6,222) | $ (11,105) | (31,823) | (23,976) |  |
GAFI |  |  |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 4 |  |  |  |  |  | 4 |  | 17 |
Prepaid expenses | 25 |  |  |  |  |  | 25 |  | 215 |
Other assets | 0 |  |  |  |  |  | 0 |  | 103 |
Total current assets | 29 |  |  |  |  |  | 29 |  | 335 |
Property, plant and equipment, net | 15,408 |  |  |  |  |  | 15,408 |  | 15,408 |
Promissory note receivable from Aemetis | 6,659 |  |  |  |  |  | 6,659 |  | 6,182 |
Total assets | 22,096 |  |  |  |  |  | 22,096 |  | 21,925 |
Liabilities and stockholder deficit |  |  |  |  |  |  |  |  |  |
Other accrued liabilities | 295 |  |  |  |  |  | 295 |  | 44 |
Secured and revolving notes | 29,373 |  |  |  |  |  | 29,373 |  | 26,621 |
Total liabilities | 29,668 |  |  |  |  |  | 29,668 |  | 26,665 |
Accumulated deficit | (7,572) |  |  |  |  |  | (7,572) |  | (4,740) |
Total liabilities and stockholder's deficit | 22,096 |  |  |  |  |  | 22,096 |  | $ 21,925 |
Selling, general and administrative expenses | 103 |  |  | 89 |  |  | 315 | 321 |  |
Operating loss | (103) |  |  | (89) |  |  | (315) | (321) |  |
Interest expense |  |  |  |  |  |  |  |  |  |
Interest rate expense | 800 |  |  | 739 |  |  | 2,304 | 2,106 |  |
Debt related fees and amortization expense | 167 |  |  | 168 |  |  | 694 | 493 |  |
Other income | (170) |  |  | (204) |  |  | (481) | (534) |  |
Net loss | $ (900) |  |  | $ (792) |  |  | $ (2,832) | $ (2,386) |  |

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