2.Significant Balance Sheet Components

Property and Equipment —Property and equipment at September 30, 2017 and December 31, 2016 consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Computers and appliances	$	13,035	$	9,754
Purchased software		3,583		2,297
Furniture and fixtures		1,503		1,477
Leasehold improvements		3,109		2,985
Total property and equipment		21,230		16,513
Accumulated depreciation and amortization		(12,449)		(11,010)
Total property and equipment—net	$	8,781	$	5,503

Accrued Expenses —Accrued expenses at September 30, 2017 and December 31, 2016 consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Accrued commissions	$	5,327	$	5,908
Accrued stock-settled bonus		6,088		6,608
Accrued vacation		787		611
Employee Stock Purchase Plan liability		838		1,811
Other accrued payroll-related expenses		2,706		3,085
Other accrued liabilities		6,706		3,651
Total accrued expenses	$	22,452	$	21,674

In conjunction with our chief executive officer’s termination in October 2017, we will make severance and bonus payments totaling $963,000, of which $367,000 of the bonus earned through our third quarter was included in other accrued payroll-related expenses as of September 30, 2017 while $596,000 will be charged to expense in the three months ending December 31, 2017, the quarter in which the termination took place.

Deferred Revenue —Current and non-current deferred revenue at September 30, 2017 and December 31, 2016 consisted of the following (in thousands):


	September 30, 2017		December 31, 2016
Perpetual license	$	43	$	404
Subscription		46,356		35,495
Software support		51,874		50,117
Professional services		2,740		2,060
Total current and noncurrent deferred revenue	$	101,013	$	88,076