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CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Statement [Abstract]        
Revenues, net $ 770 $ 625 $ 1,263 $ 1,110
Cost of sales 203 216 358 388
Gross profit 567 409 905 722
Operating expenses:        
Research and development 377 427 799 845
Selling, general and administrative 2,052 1,596 4,087 3,154
Total operating expenses 2,429 2,023 4,886 3,999
Loss from operations (1,862) (1,614) (3,981) (3,277)
Interest income (expense):        
Interest income 35 4 95 7
Interest expense (5) (6) (9) (11)
Interest income (expense), net 30 (2) 86 (4)
Net loss (1,832) (1,616) (3,895) (3,281)
Comprehensive loss $ (1,832) $ (1,616) $ (3,895) $ (3,281)
Weighted average shares outstanding - basic (in shares) 5,303,426 1,854,531 5,283,681 1,578,783
Weighted average shares outstanding - diluted (in shares) 5,303,426 1,854,531 5,283,681 1,578,783
Net loss per share - basic (in dollars per share) $ (0.35) $ (0.87) $ (0.74) $ (2.08)
Net loss per share - diluted (in dollars per share) $ (0.35) $ (0.87) $ (0.74) $ (2.08)