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Balance Sheet Components - Additional Information (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) Customer | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) Customer
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Accounts receivable, net | $ 34,233,000 |  | $ 34,233,000 |  | $ 42,241,000
Percentage of Non-US revenue invoiced in Euros | 76.30% | 76.90% | 78.40% | 78.00% |
Transfer of inventory to rental equipment |  |  | $ 509,000 | $ 1,997,000 |
Repairs and maintenance expense | $ 1,689,000 | $ 1,320,000 | 4,890,000 | 3,873,000 |
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 | 1,821,000 |  | 1,821,000 |  | 1,225,000
Customer Concentration Risk | Customer One |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Accounts receivable, net | 5,055,000 |  | 5,055,000 |  | 8,639,000
Customer Concentration Risk | Customer Two |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Accounts receivable, net | 3,730,000 |  | 3,730,000 |  | 4,994,000
Customer Concentration Risk | Medicare's Service Reimbursement Programs |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Accounts receivable, net | $ 1,375,000 |  | $ 1,375,000 |  | $ 2,059,000
Sales Revenue, Net | Customer Concentration Risk | Medicare's Service Reimbursement Programs |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 9.60% | 13.70% |
Net Accounts Receivable | Customer Concentration Risk |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Number of customers | Customer |  |  | 2 |  | 2
Net Accounts Receivable | Customer Concentration Risk | Medicare's Service Reimbursement Programs |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 4.00% |  | 4.90%
Rental Revenue | Customer Concentration Risk | Medicare's Service Reimbursement Programs |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 57.00% | 69.70% |
Raw materials | Supplier Concentration Risk | Vendor one |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 20.90% | 29.30% |
Raw materials | Supplier Concentration Risk | Vendor two |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 19.20% | 16.30% |
Raw materials | Supplier Concentration Risk | Vendor three |  |  |  |  |
Schedule Of Balance Sheet Components [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 10.60% | 9.10% |

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