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CONSOLIDATED STATEMENTS OF CASH FLOWS - 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 used in operating activities:    
Share-based compensation 995 774
Depreciation 4,894 4,434
Debt related fees and amortization expense 3,401 4,666
Intangibles and other amortization expense 48 48
Accretion of Series A preferred units 4,673 2,257
Deferred tax (benefit) expense (984) 1,123
Provision for bad debts 1,260 0
Change in fair value of stock appreciation rights 0 (80)
Changes in operating assets and liabilities:    
Accounts receivable (1,088) (963)
Inventories 2,392 (491)
Prepaid expenses 44 147
Other assets 253 (594)
Accounts payable 1,400 1,001
Accrued interest expense and fees 21,728 18,033
Other liabilities 123 7,088
Net cash provided by (used in) operating activities 2,480 (2,034)
Investing activities:    
Capital expenditures (19,340) (8,578)
Grant proceeds received for capital expenditures 2,031 0
Net cash used in investing activities (17,309) (8,578)
Financing activities:    
Proceeds from borrowings 12,648 56,314
Repayments of borrowings (15,463) (51,878)
TEC debt renewal and waiver fee payments (350) (530)
Grant proceeds received for capital expenditures 256 1,364
Payments on finance leases (1,471) 0
Proceeds from issuance of common stock in equity offering 5,113 0
Proceeds from the exercise of stock options 287 0
Proceeds from Series A preferred units financing 13,755 4,815
Net cash provided by financing activities 14,775 10,085
Effect of exchange rate changes on cash and cash equivalents (10) (5)
Net change in cash and cash equivalents for period (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:    
Cash paid for interest 1,324 2,476
Income taxes paid 8 8
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 181 162
TEC debt extension, waiver fees, promissory notes fees added to debt 1,747 1,602
Capital expenditures in accounts payable 5,931 2,391
Operating lease liabilities arising from obtaining right of use assets 2,817 1,181
Financing lease liabilities arising from obtaining right of use assets 2,309 0
Stock Appreciation Rights issued for GAFI Amendment No. 1 0 1,050
Capital expenditures purchased on financing $ 5,652 $ 0