Balance Sheet Components - Balance Sheet Components (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Inventories:
Raw materials	$ 48,215	$ 28,205
Work in process	11,009	7,973
Finished goods	60,700	60,120
Total inventories	119,924	96,298
Other current assets:
Funds held for customers, including restricted cash	20,405	18,164
Net investment in sales-type leases, current portion	10,665	10,246
Prepaid income taxes	6,656	10,095
Other current assets	10,608	2,539
Total other current assets	48,334	41,044
Other long-term assets:
Capitalized software, net	96,995	94,027
Unbilled receivables, net	18,084	17,205
Deferred debt issuance costs	3,156	4,253
Other long-term assets	9,284	3,804
Total other long-term assets	127,519	119,289
Accrued liabilities:
Operating lease liabilities, current portion	12,947	12,197
Customer fund liabilities	31,727	18,164
Advance payments from customers	8,191	6,981
Rebates and lease buyouts	44,644	21,815
Group purchasing organization fees	7,115	4,412
Taxes payable	3,771	3,520
Other accrued liabilities	24,772	13,222
Total accrued liabilities	$ 133,167	$ 80,311
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total accrued liabilities	Total accrued liabilities
Restricted cash	$ 6,569	$ 3,992	$ 0
Cash and Cash Equivalents [Line Items]
Restricted cash	6,569	3,992	$ 0
Other Current Assets
Accrued liabilities:
Restricted cash	6,600	4,000
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 6,600	$ 4,000