Balance Sheet Components - Balance Sheet Details (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Inventories:
Raw materials	$ 29,994	$ 31,331
Work in process	7,057	7,620
Finished goods	66,050	69,060
Total inventories	103,101	108,011
Other long-term assets:
Capitalized software, net	93,929	85,070
Unbilled receivables, net	15,379	12,260
Deferred debt issuance costs	4,527	4,700
Other assets	1,877	1,006
Total other long-term assets	115,712	103,036
Accrued liabilities:
Operating lease liabilities, current portion	10,633	10,058
Advance payments from customers	6,277	4,006
Rebates and lease buyouts	21,346	14,911
Group purchasing organization fees	4,211	5,934
Taxes payable	3,105	3,744
Other accrued liabilities	13,682	16,914
Total accrued liabilities	$ 59,254	$ 55,567