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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Operating activities:    
Net loss $ (36,287) $ (31,770)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation 981 1,101
Stock issued for services 22 118
Depreciation 4,580 4,622
Debt related fees and amortization expense 7,520 5,399
Intangibles and other amortization expense 140 392
Accretion of Series A preferred units 44 0
Loss on sale/disposal of assets 9 0
Impairment loss on intangible assets 865 0
Change in fair value of SARs (145) 0
Changes in operating assets and liabilities:    
Accounts receivable 1,079 (1,015)
Inventories (721) (2,370)
Prepaid expenses 1,692 371
Other current assets and other assets (380) (425)
Accounts payable 2,207 2,580
Accrued interest expense and fees, net of payments 12,463 10,812
Other liabilities 425 1,497
Net cash used in operating activities (5,506) (8,688)
Investing activities:    
Capital expenditures (4,074) (1,116)
Net cash used in investing activities (4,074) (1,116)
Financing activities:    
Proceeds from borrowings 20,071 14,798
Repayments of borrowings (18,010) (10,037)
GAFI proceeds from borrowings 3,144 3,614
GAFI repayments of borrowings (1,775) 0
Proceeds from Series A preferred units financing 6,961 0
Net cash provided by financing activities 10,391 8,375
Effect of exchange rate changes on cash and cash equivalents (51) 371
Net cash and cash equivalents increase (decrease) for period 760 (1,058)
Cash and cash equivalents at beginning of period 428 1,486
Cash and cash equivalents at end of period 1,188 428
Supplemental disclosures of cash flow information, cash paid:    
Cash paid for interest, net of capitalized interest of $135 thousand and $0 for years ended December 31, 2018 and 2017, respectively 5,590 3,092
Income taxes paid 6 6
Supplemental disclosures of cash flow information, non-cash transactions:    
Subordinated debt extension fees added to debt 680 680
Fair value of warrants issued to subordinated debt holders 235 321
Repurchase of common stock added to TEC promissory note 0 451
TEC debt extension, waiver fees, promissory notes fees added to debt 4,255 5,615
GAFI plant, property & equipment acquired with debt 0 15,431
Payment of TEC bridge loan added to GAFI Revolving loan 0 3,669
Debt exchanged for prepaid interest on GAFI Term loan 200 2,250
Stock Appreciation Rights issued for GAFI Amendment No. 1 1,277 0
GAFI Amendment No. 1 & 2 fees added to debt 250 0
Capital expenditures not paid yet 905 0
Settlement of subordinated debt through issuing stock $ 0 $ 132