Quarterly report [Sections 13 or 15(d)]

Balance Sheet Components - Additional Information (Details)

v3.25.3
Balance Sheet Components - Additional Information (Details)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Customer
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Customer
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Schedule Of Balance Sheet Components [Line Items]          
Accounts receivable, net $ 40,374,000   $ 40,374,000   $ 29,563,000
Percentage of Non-US revenue invoiced in Euros 79.20% 76.30% 78.10% 78.40%  
Transfer of inventory to rental equipment     $ 1,120,000 $ 509,000  
Salvage value of expenditures for additions, improvements and replacements $ 0   0    
Repairs and maintenance expense 1,833,000 $ 1,689,000 5,331,000 4,890,000  
Impairments of long-lived assets     0 $ 0  
Other Noncurrent Assets          
Schedule Of Balance Sheet Components [Line Items]          
Noncurrent inventories expected to be realized or consumed 521,000   521,000   1,291,000
Customer Concentration Risk | Customer One          
Schedule Of Balance Sheet Components [Line Items]          
Accounts receivable, net 4,534,000   4,534,000   3,288,000
Customer Concentration Risk | Medicare's Service Reimbursement Programs          
Schedule Of Balance Sheet Components [Line Items]          
Accounts receivable, net $ 1,376,000   $ 1,376,000   $ 1,107,000
Sales Revenue, Net | Customer Concentration Risk          
Schedule Of Balance Sheet Components [Line Items]          
Number of customers | Customer 1   1    
Sales Revenue, Net | Customer Concentration Risk | Medicare's Service Reimbursement Programs          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     9.20% 9.60%  
Net Accounts Receivable | Customer Concentration Risk          
Schedule Of Balance Sheet Components [Line Items]          
Number of customers | Customer     1    
Net Accounts Receivable | Customer Concentration Risk | Medicare's Service Reimbursement Programs          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     3.40%   4.80%
Rental Revenue | Customer Concentration Risk | Medicare's Service Reimbursement Programs          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     61.10% 57.00%  
Raw materials | Supplier Concentration Risk | Vendor one          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     18.20% 20.90%  
Raw materials | Supplier Concentration Risk | Vendor two          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     11.20% 19.20%  
Raw materials | Supplier Concentration Risk | Vendor three          
Schedule Of Balance Sheet Components [Line Items]          
Concentration Risk, Percentage     10.20% 10.60%