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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Cash flows from operating activities:    
Net loss $ (4,142) $ (8,156)
Adjustments to reconcile net loss to net cash used in operating activities:    
Change in fair value of derivative liability (2,444)  
Stock-based compensation expense 825 581
Common stock issued for services   34
Foreign exchange loss (gain) (254) 161
Depreciation expense 22 50
Amortization expense 77 94
Provision for (reversal of) inventory reserve 8 (37)
Non-cash operating lease expense 25 26
Changes in operating assets and liabilities:    
Accounts receivable (74) 57
Other receivables 230 (4)
Inventory, net 18 (64)
Prepaid expense and other current assets 298 (156)
Operating lease liability (26) (19)
Accounts payable (53) (7)
Accrued and other current liabilities (426) (779)
Deferred revenue (14) (127)
Net cash used in operating activities (5,930) (8,346)
Cash flows from investing activities:    
Purchase of property and equipment (20) (12)
Proceeds from sale of property and equipment   6
Net cash used in investing activities (20) (6)
Cash flows from financing activities:    
Proceeds from issuances of common stock   644
Share issuance costs   (24)
Net cash provided by financing activities   620
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash
Net increase in cash and cash equivalents (5,950) (7,732)
Cash and cash equivalents at beginning of period 14,549 11,005
Cash and cash equivalents at end of period $ 8,599 3,273
Non-cash investing and financing transactions:    
Right-of-use assets obtained in exchange for new lease liabilities   $ 151