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Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Revenue        
Product sales, net $ 171 $ 244 $ 295 $ 350
Revenue from Contract with Customer, Product and Service [Extensible Enumeration] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Other revenue $ 11 $ 12 $ 22 $ 17
Total revenue 182 256 317 367
Cost of revenue        
Cost of revenue $ 118 $ 184 $ 241 $ 306
Cost, Product and Service [Extensible Enumeration] us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember us-gaap:ProductMember
Gross profit $ 64 $ 72 $ 76 $ 61
Operating expenses        
Selling, general and administrative expenses 2,457 2,569 5,090 5,443
Research and development expenses 870 684 1,658 1,570
Amortization expense 7 38 14 77
Total operating expenses 3,334 3,291 6,762 7,090
Loss from operations (3,270) (3,219) (6,686) (7,029)
Nonoperating income (expense)        
Interest income (expense), net (5) 89 (13) 189
Change in fair value of derivative liability 1,733 1,223 2,875 2,444
Foreign exchange gain (loss) (141) 259 (429) 254
Other income, net 71   125  
Nonoperating income, net 1,658 1,571 2,558 2,887
Loss before provision for income taxes (1,612) (1,648) (4,128) (4,142)
Provision for income taxes
Net loss (1,612) (1,648) (4,128) (4,142)
Other comprehensive income (loss)        
Foreign currency translation adjustments 140 (267) 428 (262)
Comprehensive loss $ (1,472) $ (1,915) $ (3,700) $ (4,404)
Loss per share        
Basic (in dollar per share) $ (0.64) $ (2.92) $ (2.48) $ (7.34)
Diluted (in dollar per share) $ (0.64) $ (2.92) $ (2.48) $ (7.34)
Weighted average number of common shares outstanding        
Basic (in shares) 2,518,071 564,423 1,667,699 564,279
Diluted (in shares) 2,518,071 564,423 1,667,699 564,279