Organization and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	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%