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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities    
Net loss $ (14,130) $ (9,781)
Adjustments to reconcile net loss to net cash used in operating activities:    
Change in fair value of derivative financial instruments (4) (14,113)
Stock-based compensation expense 2,529 4,691
Unrealized foreign exchange (gain) loss (182) 70
Depreciation expense 119 127
Amortization expense 363 64
Provision for doubtful accounts 140 220
Provision for inventory reserve 205 50
Intangible asset impairment 184  
Loss from disposal of property and equipment 110  
Gain on lease modification (56)  
Changes in operating assets and liabilities:    
Accounts receivable (4) (438)
Other receivables 226 (278)
Inventory 4 (256)
Prepaid expenses (125) (163)
Other current assets   264
Operating lease liability (28) (13)
Account payable (635) (1,116)
Accrued liabilities (280) (327)
Deferred revenue (174)  
Net cash used in operating activities (11,738) (20,999)
Cash flows from investing activities    
Purchase of property and equipment (63) (278)
Proceeds from sale of property and equipment 61  
Business acquisitions, net of cash acquired   (416)
Internally developed software (7) (75)
Net cash used in investing activities (9) (769)
Cash flows from financing activities    
Proceeds from the issuances of common stock and warrants 10,653 1,685
Share issuance costs (1,015) (247)
Proceeds from the exercise of stock options and warrants   215
Proceeds from Paycheck Protection Program Loan 323  
Repayment of Paycheck Protection Program Loan (323)  
Net cash provided by financing activities 9,638 1,653
Effect of foreign exchange rate changes on cash (19) (9)
Net decrease in cash (2,128) (20,124)
Cash at beginning of year 5,459 25,583
Cash at end of year 3,331 5,459
Supplemental schedule of non-cash investing and financing activities    
Share issuance costs included in accounts payable and accrued liabilities $ 162 358
Reclassification of derivative instruments from warrant exercise   35
Noncash items related to Heuro acquisition   $ 1,227