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Organization and Summary of Significant Accounting Policies - Narrative (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) reporting_unit segment | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019
Accounting Policies [Line Items] |  |  |  |
Number of operating segments | segment | 1 |  |  |
Number of reporting segments | segment | 1 |  |  |
Deferred revenues, net of cost of goods sold | $ 156,332,000 | $ 132,390,000 |  |
Deferred revenues, net of cost of goods sold, expected to be completed within one year | $ 118,947,000 | 112,196,000 |  |
Recognition period | ten years |  |  |
Fees to GPOs | $ 17,600,000 | 17,500,000 | $ 9,700,000 |
Amortization period for capitalized contract costs | 10 years |  |  |
Initial term and renewal service periods | 10 years |  |  |
Contract cost expense | $ 30,600,000 | 25,800,000 | 22,100,000 |
Impairment loss related to capitalized prepaid commissions | $ 0 |  |  |
Operating lease renewal terms | 1 year |  |  |
Non-recourse accounts receivable transferred | $ 45,300,000 | 46,700,000 | 58,800,000 |
Accounts receivable due from third-party leasing companies for transferred non-recourse accounts receivable | 6,700,000 | 5,600,000 |  |
Cash and cash equivalents | 330,362,000 | 349,051,000 | 485,928,000 |
Cash equivalents | 301,000,000 | 320,200,000 |  |
Minimum required purchase obligation | 159,700,000 |  |  |
Cost of revenues | $ 706,960,000 | $ 577,365,000 | 478,916,000 |
Number of reporting units | reporting_unit | 1 |  |  |
Accumulated impairment loss on goodwill | $ 0 |  |  |
Accounting Standards Update [Extensible List] |  | Accounting Standards Update 2020-06 [Member] |  | Accounting Standards Update 2016-13 [Member]
Other Assets |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Software development costs capitalized | $ 13,200,000 | $ 29,400,000 |  |
Internal Use Software and Software Development Costs |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Useful life of property and equipment | 5 years |  |  |
Internal Use Software and Software Development Costs | Property and Equipment |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Software development costs capitalized | $ 33,000,000 | 12,700,000 |  |
Shipping Costs | Selling, general, and administrative |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Cost of revenues | 24,500,000 | 18,200,000 | 15,600,000 |
Primary Supplier |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Minimum required purchase obligation | $ 0 |  |  |
Period for notice of termination | 6 months |  |  |
Purchases from suppliers | $ 105,700,000 | $ 103,200,000 | $ 76,300,000 |
Minimum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Original terms of contracts | 1 year |  |  |
Maximum |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Original terms of contracts | 5 years |  |  |
Estimated useful life of software-related products | 5 years |  |  |
Customer Concentration Risk | Revenues | Ten Largest GPOs |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Concentration risk percentage | 68.00% |  |  |
Customer Concentration Risk | Lease Receivable | U.S. Government Hospitals |  |  |  |
Accounting Policies [Line Items] |  |  |  |
Concentration risk percentage | 38.00% |  |  |

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