2.Significant Balance Sheet Components

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


	March 31, 2017		December 31, 2016
Computers and appliances	$	10,141	$	9,754
Purchased software		2,361		2,297
Furniture and fixtures		1,483		1,477
Leasehold improvements		3,002		2,985
Total property and equipment		16,987		16,513
Accumulated depreciation and amortization		(11,798)		(11,010)
Total property and equipment—net	$	5,189	$	5,503

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


	March 31, 2017		December 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 (1)		7,500		—
Other accrued liabilities		4,218		3,651
Total accrued expenses	$	17,707	$	21,674

(1)

Accrued litigation settlement represents the expected amount due to plaintiffs under an agreement in principle to settle class action lawsuits filed against the Company, its officers, directors and other defendants. In addition, prepaid expenses and other current assets includes a $6.4 million receivable at March 31, 2017, which represents the amount that we expect will be contributed toward the settlement by the Company’s Director & Officer liability insurance. See also Note 11.

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


	March 31, 2017		December 31, 2016
Perpetual license	$	174	$	404
Subscription		37,777		35,495
Software support		50,840		50,117
Professional services		2,371		2,060
Total current and noncurrent deferred revenue	$	91,162	$	88,076