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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Sales        
Total revenue $ 2,696 $ 3,631 $ 4,833 $ 6,926
Cost of sales        
Total cost of sales 1,368 1,828 2,622 3,769
Gross margin 1,328 1,803 2,211 3,157
Operating Expenses:        
Research and development 4,541 5,959 9,578 11,529
General and administrative 3,859 4,421 8,067 8,851
Sales and marketing 2,523 2,269 5,063 4,273
Total operating expenses 10,923 12,649 22,708 24,653
Loss from operations (9,595) (10,846) (20,497) (21,496)
Interest income 239 675 556 1,471
Change in Fair Value of Warrant Liabilities 46 0 1,664 0
Other income (expense), net 85 15 (366) 21
Loss before provision for income taxes (9,225) (10,156) (18,643) (20,004)
Provision for income taxes 0 0 0 0
Net loss and comprehensive loss $ (9,225) $ (10,156) $ (18,643) $ (20,004)
Net loss per common share attributable to common stockholders, basic $ (0.12) $ (0.14) $ (0.24) $ (0.28)
Net loss per common share attributable to common stockholders, diluted $ (0.12) $ (0.14) $ (0.24) $ (0.28)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic 78,077,118 72,041,332 76,893,733 71,987,688
Weighted-average shares used to compute net loss per share attributable to common stockholders, diluted 78,077,118 72,041,332 76,893,733 71,987,688
Device        
Sales        
Total revenue $ 2,128 $ 2,970 $ 3,650 $ 5,674
Cost of sales        
Total cost of sales 1,097 1,422 2,082 2,921
Service        
Sales        
Total revenue 568 661 1,183 1,252
Cost of sales        
Total cost of sales $ 271 $ 406 $ 540 $ 848