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Nature of expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Nature of expenses    
Production and manufacturing costs $ 2,738 $ 3,063
Salaries and benefits 12,835 9,917
Consulting fees 4,076 3,395
Research and development expenses 3,433 2,318
Sales and marketing expenses 1,142 574
Amortization and depreciation 1,879 1,538
Share-based compensation 7,205 3,018
Rent 250 231
Software/hardware 619 424
Insurance 1,397 1,278
Other expenses 1,590 411
Nature of expenses, total $ 37,164 26,167
Salaries and benefits, net of government assistance   376
Research and development expenses, net of reimbursements   $ 316