Significant Balance Sheet Components - Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Accrued commissions	$ 2,881	$ 5,908
Accrued stock settled bonus		6,608
Accrued vacation	699	611
Employee stock purchase plan liability	830	1,811
Other accrued payroll-related expenses	1,579	3,085
Accrued litigation settlement	7,500
Other accrued liabilities	4,218	3,651
Total accrued expenses	17,707	$ 21,674
Prepaid expenses and other current assets
Insurance payment	$ 6,400