Balance Sheet Components - Balance Sheet Details (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Inventories:
Raw materials	$ 33,945	$ 31,331
Work in process	11,957	7,620
Finished goods	66,883	69,060
Total inventories	112,785	108,011
Other long-term assets:
Capitalized software, net	90,395	85,070
Unbilled receivables, net	14,338	12,260
Deferred debt issuance costs	4,459	4,700
Other assets	1,739	1,006
Total other long-term assets	110,931	103,036
Accrued liabilities:
Operating lease liabilities, current portion	9,986	10,058
Advance payments from customers	6,442	4,006
Rebates and lease buyouts	15,156	14,911
Group purchasing organization fees	5,382	5,934
Taxes payable	5,974	3,744
Other accrued liabilities	15,120	16,914
Total accrued liabilities	$ 58,060	$ 55,567