Consolidated Balance Sheet Components

12 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidated Balance Sheet Components

7. Consolidated Balance Sheet Components

Allowance for Doubtful Accounts

The allowance for doubtful accounts is comprised of the following activity (in thousands):

	Years Ended December 31,
	2014			2013			2012
Allowance for doubtful accounts, beginning balance	$	410		$	412		$	225
Charged to costs and expenses		418			46			269
Deductions (write-offs)		(613	)		(48	)		(82	)
Allowance for doubtful accounts, ending balance	$	215		$	410		$	412

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	As of December 31,
	2014		2013
Prepaid expenses	$	3,263	$	2,632
Prepaid income taxes		45		786
Interest receivable		230		268
Other		389		286
Total prepaid expenses and other current assets	$	3,927	$	3,972

Property and Equipment, net

Property and equipment, net consist of the following (in thousands):

	As of December 31,
	2014			2013
Computers and related equipment	$	11,591		$	8,989
Office furniture and equipment		1,510			1,403
Leasehold improvements		3,751			2,773
Total property and equipment		16,852			13,165
Less: accumulated depreciation and amortization		(9,234	)		(7,690	)
Total property and equipment, net	$	7,618		$	5,475

Depreciation and amortization expense totaled $3.6 million, $2.6 million and $1.8 million, for the years ended December 31, 2014, 2013 and 2012, respectively.

Accrued Compensation and Benefits

Accrued compensation and benefits consist of the following (in thousands):

	As of December 31,
	2014		2013
Salary and related benefits	$	5,291	$	4,399
Accrued vacation		3,849		4,122
Accrued incentive payments		6,609		4,409
Total accrued compensation and benefits	$	15,749	$	12,930

Accrued and Other Current Liabilities

Accrued and other current liabilities consist of the following (in thousands):

	As of December 31,
	2014		2013
Accrued expenses	$	3,352	$	2,295
Derivative liability		1,002		—
Income tax payable		317		325
Short-term deferred rent		297		226
Short-term stock repurchase liability		767		521
Other		641		594
Total accrued and other current liabilities	$	6,376	$	3,961

Other Liabilities

Other long-term liabilities consist of the following (in thousands):

	As of December 31,
	2014		2013
Skyfence holdback liability	$	7,343	$	—
Stock repurchase liability		—		857
Long-term deferred rent		841		725
Deferred tax liability		1,503		34
Other		721		377
Total other liabilities	$	10,408	$	1,993