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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities:    
Net loss $ (9,343) $ (8,118)
Adjustments to reconcile net loss to net cash used in operating activities:    
Change in fair value of derivative financial instruments   (3)
Stock-based compensation expense 3,156 1,571
Unrealized foreign exchange (gain) loss (323) 433
Depreciation expense 56 67
Amortization expense 106 215
(Recovery of) provision for doubtful accounts (11) 153
Non-cash lease expense 30 196
Intangible asset impairment   181
Loss from disposal of property and equipment   110
Gain on lease modification   (56)
Changes in operating assets and liabilities:    
Accounts receivable 34 1
Other receivables (13) 226
Inventory (118) 28
Prepaid expenses (98) (105)
Operating lease liability (31) (126)
Accounts payable 229 (1,288)
Accrued liabilities (366) (381)
Deferred revenue 2 (83)
Net cash used in operating activities (6,690) (6,979)
Cash flows from investing activities:    
Purchase of property and equipment (19) (3)
Proceeds from sale of property and equipment   61
Internally developed software (2) (7)
Net cash (used in) provided by investing activities (21) 51
Cash flows from financing activities:    
Proceeds from the issuances of common stock and warrants 11,037 7,233
Share issuance costs (1,523) (506)
Proceeds from the exercise of warrants and stock options 1,320  
Proceeds from Paycheck Protection Program Loan   323
Repayment of Paycheck Protection Program Loan   (323)
Net cash provided by financing activities 10,834 6,727
Effect of foreign exchange rate changes on cash (29) 6
Net increase (decrease) in cash 4,094 (195)
Cash at beginning of period 3,331 5,459
Cash at end of period $ 7,425 5,264
Supplemental schedule of non-cash financing activities    
Share issuance costs included in accounts payable and accrued liabilities   $ 54