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15. Parent Company Financial Statements (Tables) | 12 Months Ended
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Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract] |
Parent Balance Sheets |
Assets |  | 2020 |  |  | 2019 |
Current assets |  |  |  |  |  |
Cash and cash equivalents |  | $ | 318 |  |  | $ | - |
Prepaid expenses |  |  | 252 |  |  |  | 290 |
Other current assets |  |  | - |  |  |  | 29 |
Total current assets |  |  | 570 |  |  |  | 319 |
Investment in AE Advanced Products Keyes , Inc. |  |  | 12 |  |  |  | 293 |
Investment in Aemetis International, Inc. |  |  | 4,196 |  |  |  | 3,638 |
Total investments in Subsidiaries, net of advances |  |  | 4,208 |  |  |  | 3,931 |
Property, plant and equipment, net |  |  | 9 |  |  |  | 4 |
Other assets |  |  | 2,700 |  |  |  | 257 |
Total Assets |  | $ | 7,487 |  |  | $ | 4,511 |
Liabilities & stockholders' deficit |  |  |  |  |  |  |  |
Current liabilities |  |  |  |  |  |  |  |
Accounts payable |  | $ | 4,881 |  |  | $ | 5,097 |
Payables due to subsidiaries |  |  | 4,390 |  |  |  | 3,176 |
Mandatorily redeemable Series B convertible preferred |  |  | 3,252 |  |  |  | 3,149 |
Other current liabilities |  |  | 11,930 |  |  |  | 9,217 |
Total current liabilities |  |  | 24,453 |  |  |  | 20,639 |
Long term liabilities: |  |  |  |  |  |  |  |
Other long term debt |  |  | 150 |  |  |  | - |
Subsidiary obligation in excess of investment |  |  |  |  |  |  |  |
Investment in AE Advanced Fuels, Inc. |  |  | 131,432 |  |  |  | 112,041 |
Investment in Aemetis Americas, Inc |  |  | 205 |  |  |  | 205 |
Investment in Aemetis Biofuels, Inc. |  |  | 2,738 |  |  |  | 2,738 |
Investment in Aemetis Technologies, Inc. |  |  | 4,446 |  |  |  | 4,234 |
Investment in Aemetis Property Keyes, Inc. |  |  | 247 |  |  |  | 564 |
Investment in Aemetis Health Products, Inc. |  |  | 441 |  |  |  | 349 |
Investment in Goodland Advanced Fuels, Inc. |  |  | 12,201 |  |  |  | 8,501 |
Investment in Aemetis Biogas LLC |  |  | 15,918 |  |  |  | 9,612 |
Total subsidiary obligation in excess of investment |  |  | 167,628 |  |  |  | 138,244 |
Total long term liabilities |  |  | 167,778 |  |  |  | 138,244 |
Stockholders' deficit |  |  |  |  |  |  |  |
Series B Preferred convertible stock |  |  | 1 |  |  |  | 1 |
Common stock |  |  | 23 |  |  |  | 21 |
Additional paid-in capital |  |  | 93,426 |  |  |  | 86,852 |
Accumulated deficit |  |  | (274,080 | ) |  |  | (237,421 | )
Accumulated other comprehensive loss |  |  | (4,114 | ) |  |  | (3,825 | )
Total stockholders' deficit |  |  | (184,744 | ) |  |  | (154,372 | )
Total liabilities & stockholders' deficit |  | $ | 7,487 |  |  | $ | 4,511 |
Parent Statements of Operations and Comprehensive Loss |
|  | 2020 |  |  | 2019 |
Equity in subsidiary losses |  | $ | (28,820 | ) |  | $ | (21,745 | )
Selling, general and administrative expenses |  |  | 6,707 |  |  |  | 6,673 |
Operating loss |  |  | (35,527 | ) |  |  | (28,418 | )
Other expense |  |  |  |  |  |  |  |
Interest expense |  |  | 677 |  |  |  | 1,392 |
Other expense |  |  | 448 |  |  |  | 5,899 |
Loss before income taxes |  |  | (36,652 | ) |  |  | (35,709 | )
Income tax expense |  |  | 7 |  |  |  | 7 |
Net loss |  |  | (36,659 | ) |  |  | (35,716 | )
Other comprehensive loss |  |  |  |  |  |  |  |
Foreign currency translation adjustment |  |  | (289 | ) |  |  | (249 | )
Comprehensive loss |  | $ | (36,948 | ) |  | $ | (35,965 | )
Parent Statements of Cash Flows |
|  | 2020 |  |  | 2019 |
Operating activities: |  |  |  |  |  |
Net loss |  | $ | (36,659 | ) |  | $ | (35,716 | )
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |
Stock-based compensation |  |  | 995 |  |  |  | 774 |
SARs Amortization |  |  | - |  |  |  | 800 |
Depreciation |  |  | 4 |  |  |  | 8 |
Subsidiary portion of net losses |  |  | 28,820 |  |  |  | 21,745 |
Change in fair value of SARs liability |  |  | - |  |  |  | (82 | )
Changes in assets and liabilities: |  |  |  |  |  |  |  |
Prepaid expenses |  |  | 38 |  |  |  | 74 |
Accounts payable |  |  | (216 | ) |  |  | 71 |
Accrued interest expense |  |  | 525 |  |  |  | 1,184 |
Other liabilities |  |  | (578 | ) |  |  | 5,891 |
Other assets |  |  | 236 |  |  |  | (232 | )
Net cash used in operating activities |  |  | (6,835 | ) |  |  | (5,483 | )
Investing activities: |  |  |  |  |  |  |  |
Subsidiary advances, net |  |  | 1,332 |  |  |  | 6,781 |
Net cash provided by investing activities |  |  | 1,332 |  |  |  | 6,781 |
Financing activities: |  |  |  |  |  |  |  |
Proceeds from borrowings |  |  | 421 |  |  |  | - |
Repayments of borrowings under secured debt facilities |  |  | - |  |  |  | (1,298 | )
Proceeds from the exercise of stock options |  |  | 287 |  |  |  | - |
Proceeds from issuance of common stock in equity offering |  |  | 5,113 |  |  |  | - |
Net cash provided by (used in) financing activities |  |  | 5,821 |  |  |  | (1,298 | )
Net increase in cash and cash equivalents |  |  | 318 |  |  |  | - |
Cash and cash equivalents at beginning of period |  |  | - |  |  |  | - |
Cash and cash equivalents at end of period |  | $ | 318 |  |  | $ | - |
Supplemental disclosures of cash flow information, cash paid: |  |  |  |  |  |  |  |
Interest payments |  | $ | - |  |  | $ | - |
Income taxes paid |  |  | 7 |  |  |  | 8 |
Supplemental disclosures of cash flow information, non-cash transactions: |  |  |  |  |  |  |  |
Fair value of warrants issued to subordinated debt holders |  |  | 181 |  |  |  | 162 |
Exercise of Stock Appreciation Rights added to GAFI debt |  |  | - |  |  |  | 1,050 |
Reclassification of GAFI Non-controlling interest |  |  | - |  |  |  | 8,501 |
Operating lease liabilities arising from obtaining right of use assets |  |  | 2,632 |  |  |  | 640 |

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