CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Sales
Total sales	$ 12,890	$ 11,032
Cost of sales
Total cost of sales	6,999	6,275
Gross margin	5,891	4,757
Operating Expenses:
Research and development	22,499	22,493
General and administrative	17,494	20,276
Sales and marketing	9,122	10,103
Total operating expenses	49,115	52,872
Loss from operations	(43,224)	(48,115)
Interest income	2,492	3,842
Other income (expense), net	12	35
Loss before provision for income taxes	(40,720)	(44,238)
Provision for income taxes	0	0
Net loss and comprehensive loss	$ (40,720)	$ (44,238)
Net loss per common share attributable to common stockholders, basic	$ (0.56)	$ (0.62)
Net loss per common share attributable to common stockholders, diluted	$ (0.56)	$ (0.62)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic	72,413,541	71,316,424
Weighted-average shares used to compute net loss per share attributable to common stockholders, diluted	72,413,541	71,316,424
Device
Sales
Total sales	$ 10,450	$ 8,746
Cost of sales
Total cost of sales	5,387	4,463
Service
Sales
Total sales	2,440	2,286
Cost of sales
Total cost of sales	$ 1,612	$ 1,812