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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Operating activities:    
Net loss $ (39,477) $ (36,287)
Adjustments to reconcile net loss to net cash used in operating activities:    
Share-based compensation 774 981
Stock issued for services 0 22
Depreciation 4,434 4,580
Debt related fees and amortization expense 4,666 7,520
Intangibles and other amortization expense 48 140
Accretion of Series A preferred units 2,257 44
Deferred tax expense 1,123 0
Loss on sale/disposal of assets 0 9
Impairment loss on intangible assets 0 865
Change in fair value of stock appreciation rights (80) (145)
Changes in operating assets and liabilities:    
Accounts receivable (963) 1,079
Inventories (491) (721)
Prepaid expenses 147 1,692
Other assets (594) (380)
Accounts payable 1,001 2,207
Accrued interest expense and fees 18,033 12,463
Other liabilities 7,088 425
Net cash used in operating activities (2,034) (5,506)
Investing activities:    
Capital expenditures (8,578) (4,074)
Net cash used in investing activities (8,578) (4,074)
Financing activities:    
Proceeds from borrowings 54,834 20,071
Repayments of borrowings (51,714) (18,010)
GAFI proceeds from borrowings 1,480 3,144
GAFI repayments of borrowings (164) (1,775)
GAFI renewal fee payment (530) 0
Grant proceeds received for capital expenditures 1,364 0
Proceeds from Series A preferred units financing 4,815 6,961
Net cash provided by financing activities 10,085 10,391
Effect of exchange rate changes on cash and cash equivalents (5) (51)
Net cash and cash equivalents increase (decrease) for period (532) 760
Cash and cash equivalents at beginning of period 1,188 428
Cash and cash equivalents at end of period 656 1,188
Supplemental disclosures of cash flow information, cash paid:    
Cash paid for interest, net of capitalized interest of $316 thousand and $135 for years ended December 31, 2019 and 2018, respectively 2,476 5,590
Income taxes paid 8 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 162 235
TEC debt extension, waiver fees, promissory notes fees added to debt 1,602 4,255
Capital expenditures in accounts payable 2,391 905
Operating lease liabilities arising from obtaining right of use assets 1,181 0
Exercise of stock appreciation rights added to GAFI debt 1,050 0
Debt exchanged for prepaid interest on GAFI Term loan 0 200
GAFI Amendment No. 1 & 2 fees added to debt 0 250
Stock Appreciation Rights issued for GAFI Amendment No. 1 $ 0 $ 1,277