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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Condensed Consolidated Statements of Operations and Comprehensive Loss        
Revenues $ 133 $ 45 $ 534 $ 1,147
Cost of goods sold 78 3 283 668
Gross profit 55 42 251 479
Operating expenses:        
Research and development 247 402 694 683
General and administrative 1,646 1,777 3,652 3,185
Total operating expenses 1,893 2,179 4,346 3,868
Loss from operations (1,838) (2,137) (4,095) (3,389)
Other income, net:        
Interest income 115 77 248 138
Government assistance 43 185 91 264
Other income, net   3   7
Total other income, net 158 265 339 409
Net loss $ (1,680) $ (1,872) $ (3,756) $ (2,980)
Net loss per share - basic (in dollar per share) $ (0.03) $ (0.04) $ (0.07) $ (0.07)
Net loss per share - fully diluted (in dollar per share) $ (0.03) $ (0.04) $ (0.07) $ (0.07)
Weighted average number of shares outstanding - basic (in shares) 55,217,968 47,312,810 55,107,588 43,080,454
Weighted average number of shares outstanding - fully diluted (in shares) 55,217,968 47,312,810 55,107,588 43,080,454
Comprehensive loss:        
Net loss $ (1,680) $ (1,872) $ (3,756) $ (2,980)
Foreign-exchange translation adjustments   (1)   (4)
Comprehensive loss $ (1,680) $ (1,873) $ (3,756) $ (2,984)