Balance Sheet Components - Balance Sheet Details (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Inventories:
Raw materials	$ 32,101	$ 31,331
Work in process	7,833	7,620
Finished goods	74,311	69,060
Total inventories	114,245	108,011
Other long-term assets:
Capitalized software, net	94,166	85,070
Unbilled receivables, net	16,132	12,260
Deferred debt issuance costs	4,218	4,700
Other assets	1,681	1,006
Total other long-term assets	116,197	103,036
Accrued liabilities:
Operating lease liabilities, current portion	10,463	10,058
Advance payments from customers	4,651	4,006
Rebates and lease buyouts	18,690	14,911
Group purchasing organization fees	4,250	5,934
Taxes payable	2,963	3,744
Other accrued liabilities	11,962	16,914
Total accrued liabilities	$ 52,979	$ 55,567