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14. Parent Company Financial Statements (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Operating activities:    
Net loss $ (31,770) $ (15,636)
Adjustments to reconcile net loss to net cash provided by (used in) operating activitites:    
Stock-based compensation 1,101 747
Stock issued for services 118 0
Depreciation 4,622 4,670
Changes in operating assets and liabilities:    
Prepaid expenses 371 (28)
Accounts payable 2,580 (2,097)
Accrued interest expense 10,812 6,448
Other liabilities 1,497 474
Net cash used in operating activities (8,688) 371
Investing activities:    
Net cash used in investing activities (1,116) (629)
Financing activities:    
Net cash provided by financing activities 8,375 1,627
Net cash and cash equivalents increase (decrease) for period (1,058) 1,203
Cash and cash equivalents at beginning of period 1,486 283
Cash and cash equivalents at end of period 428 1,486
Supplemental disclosures of cash flow information, cash paid:    
Interest payments 3,092 4,894
Income tax expense 6 6
Supplemental disclosures of cash flow information, non-cash transactions:    
Fair value of warrants issued to subordinated debt holders 321 579
Repurchase of common stock added to TEC promissory note 451 0
Settlement of accounts payable through transfer of equipment 0 66
Settlement of subordinated debt through issuing stock 132 0
Payment of TEC bridge loan added to GAFI Revolving loan 3,669 0
Parent Company Financial Statements    
Operating activities:    
Net loss (30,301) (15,636)
Adjustments to reconcile net loss to net cash provided by (used in) operating activitites:    
Stock-based compensation 1,101 747
Stock issued for services 118 0
Depreciation 6 (25)
Subsidiary portion of net losses 22,341 10,272
Changes in operating assets and liabilities:    
Prepaid expenses 19 45
Accounts payable 529 293
Accrued interest expense 503 284
Other liabilities 64 104
Net cash used in operating activities (5,620) (3,916)
Investing activities:    
Subsidiary advances, net 5,149 3,916
Net cash used in investing activities 5,149 3,916
Financing activities:    
Proceeds from borrowings under secured debt facilities 500 0
Net cash provided by financing activities 500 0
Net cash and cash equivalents increase (decrease) for period 29 0
Cash and cash equivalents at beginning of period 0 0
Cash and cash equivalents at end of period 29 0
Supplemental disclosures of cash flow information, cash paid:    
Interest payments 0 0
Income tax expense 6 6
Supplemental disclosures of cash flow information, non-cash transactions:    
Fair value of warrants issued to subordinated debt holders 321 579
Repurchase of common stock added to TEC promissory note 451 0
Settlement of accounts payable through transfer of equipment 0 66
Settlement of subordinated debt through issuing stock 132 0
Payment of TEC bridge loan added to GAFI Revolving loan $ 3,669 $ 0