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Condensed Consolidated Interim Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows used in operating activities:    
Net loss $ (6,517) $ (7,382)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,128 3,225
Amortization of deferred charges 66 78
Share of loss from joint ventures 52 127
Interest expense 683 741
Interest income (110) (3)
Interest paid on long-term debt (747) (851)
Unrealized foreign exchange gain/loss 113  
Non-cash lease expense (116) (128)
Share-based compensation 964 1,998
Deferred income taxes (2,062) (2,538)
Changes in non-cash working capital items (5,091) (9,703)
Net cash used in operating activities (9,637) (14,436)
Cash flows used in investing activities:    
Purchases of property, plant and equipment (5,263) (4,706)
Note receivable (3,442)  
Advances to joint ventures   (5)
Investment in minority interests   (500)
Net cash used in investing activities (8,705) (5,211)
Cash flows provided by financing activities:    
Proceeds from borrowings 2,120 4,176
Repayments on borrowings (983) (4,223)
Proceeds from issuance of common stock and warrants   135,000
Issuance costs   (7,511)
Proceeds from exercise of stock options 176 125
Proceeds from exercise of warrants   17,663
Payments on capital lease obligations (301) (155)
Payment of note payable related to acquisition   (15,498)
Net cash provided by financing activities 1,012 129,577
Effect of exchange rate changes on cash and cash equivalents 96 178
Net (decrease) increase in cash and cash equivalents (17,234) 110,108
Cash and cash equivalents, beginning of period 58,667 25,679
Cash and cash equivalents, end of period $ 41,433 $ 135,787