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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue        
Product sales, net $ 244 $ 119 $ 350 $ 302
Revenue from Contract with Customer, Product and Service [Extensible Enumeration] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Other revenue $ 12   $ 17 $ 7
Total revenue 256 $ 119 367 309
Cost of revenue        
Cost of revenue $ 184 $ 88 $ 306 $ 212
Cost, Product and Service [Extensible Enumeration] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Gross profit (loss) $ 72 $ 31 $ 61 $ 97
Operating expenses        
Selling, general and administrative expenses 2,569 2,461 5,443 5,280
Research and development expenses 684 953 1,570 2,717
Amortization expense 38 47 77 94
Total operating expenses 3,291 3,461 7,090 8,091
Loss from operations (3,219) (3,430) (7,029) (7,994)
Nonoperating income (expense)        
Interest income (expense), net 89   189  
Change in fair value of derivative liability 1,223   2,444  
Foreign exchange (loss) gain 259 (380) 254 (163)
Other income (expense), net       1
Nonoperating income (expense), net 1,571 (380) 2,887 (162)
Loss before provision for income taxes (1,648) (3,810) (4,142) (8,156)
Provision for income taxes
Net loss (1,648) (3,810) (4,142) (8,156)
Other comprehensive income (loss)        
Foreign currency translation adjustments (267) 351 (262) 149
Comprehensive loss $ (1,915) $ (3,459) $ (4,404) $ (8,007)
Loss per share        
Basic $ (0.06) $ (0.97) $ (0.15) $ (2.11)
Diluted $ (0.06) $ (0.97) $ (0.15) $ (2.11)
Weighted average number of common shares outstanding        
Basic 28,219,824 3,928,704 28,216,641 3,858,676
Diluted 28,219,824 3,928,704 28,216,641 3,858,676