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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows used in operating activities:    
Net loss $ (6,636) $ (6,517)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,986 3,128
Amortization of deferred charges 34 66
Share of loss from joint ventures   52
Net loss attributable to non-controlling interest (79) (162)
Interest expense 1,133 683
Interest income (196) (110)
Interest paid on long-term debt (1,511) (747)
Unrealized foreign exchange gain/loss (13) 113
Loss on disposal of assets 4  
Operating lease liabilities (4) (116)
Share-based compensation 1,732 964
Deferred income taxes (734) (2,062)
Changes in non-cash working capital items (1,384) (5,091)
Net cash used in operating activities (3,668) (9,637)
Cash flows used in investing activities:    
Purchases of property, plant and equipment (1,076) (5,263)
Notes receivable   (3,442)
Net cash used in investing activities (1,076) (8,705)
Cash flows provided by financing activities:    
Proceeds from borrowings   2,120
Repayments on borrowings (4,788) (983)
Proceeds from issuance of common stock and warrants 24,772  
Issuance costs (1,437)  
Proceeds from exercise of stock options 83 176
Payments on capital lease obligations   (301)
Net cash provided by financing activities 18,630 1,012
Effect of exchange rate changes on cash and cash equivalents (678) 96
Net increase (decrease) in cash, cash equivalents and restricted cash 13,208 (17,234)
Cash, cash equivalents and restricted cash, beginning of period 21,676 58,667
Cash, cash equivalents and restricted cash, end of period $ 34,884 $ 41,433