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15. Parent Company Financial Statements (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating activities:    
Net loss $ (36,659) $ (39,477)
Adjustments to reconcile net loss to net cash provided by (used in) operating activitites:    
Stock-based compensation 995 774
Depreciation 4,894 4,434
Changes in operating assets and liabilities:    
Prepaid expenses 44 147
Accounts payable 1,400 1,001
Accrued interest expense 21,728 18,033
Other liabilities 123 7,088
Net cash used in operating activities 2,480 (2,034)
Investing activities:    
Net cash used in investing activities (17,309) (8,578)
Financing activities:    
Proceeds from the exercise of stock options 287 0
Proceeds from issuance of common stock in equity offering 5,113 0
Net cash (used)/provided by financing activities 14,775 10,085
Net increase (decrease) in cash and cash equivalents (64) (532)
Cash and cash equivalents at beginning of period 656 1,188
Cash and cash equivalents at end of period 592 656
Supplemental disclosures of cash flow information, cash paid:    
Interest payments 1,324 2,476
Income tax expense 8 8
Supplemental disclosures of cash flow information, non-cash transactions:    
Fair value of warrants issued to subordinated debt holders 181 162
Parent Company Financial Statements    
Operating activities:    
Net loss (36,659) (35,716)
Adjustments to reconcile net loss to net cash provided by (used in) operating activitites:    
Stock-based compensation 995 774
SARs Amortization 0 800
Depreciation 4 8
Subsidiary portion of net losses 28,820 21,745
Change in fair value of SARs liability 0 (82)
Changes in operating 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 used in investing activities 1,332 6,781
Financing activities:    
Proceeds from borrowings 421 0
Repayments of borrowings under secured debt facilities 0 (1,298)
Proceeds from the exercise of stock options 287 0
Proceeds from issuance of common stock in equity offering 5,113 0
Net cash (used)/provided by financing activities 5,821 (1,298)
Net increase (decrease) in cash and cash equivalents 318 0
Cash and cash equivalents at beginning of period 0 0
Cash and cash equivalents at end of period 318 0
Supplemental disclosures of cash flow information, cash paid:    
Interest payments 0 0
Income tax expense 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 0 1,050
Reclassification of GAFI Noncontrolling interest 0 8,501
Operating lease liabilities arising from obtaining right of use assets $ 2,632 $ 640