2. BALANCE SHEET COMPONENTS

Property and equipment consists of the following (in thousands):

	Year Ended June 30,
	2013			2012
Computers and equipment	$	6,207		$	3,859
Furniture and fixtures		316			290
Leasehold improvements		407			410
Total		6,930			4,559
Accumulated depreciation and amortization		(3,386	)		(2,264	)
Property and equipment, net	$	3,544		$	2,295

Depreciation and amortization expense was $1.3 million, $846,000 and $598,000 for the years ended June 30, 2013, 2012 and 2011, respectively. Disposals of fixed assets were $0, $254,000 and $75,000 at June 30, 2013, 2012 and 2011, respectively. Fully depreciated equipment of $19.3 million and $19.3 million at June 30, 2013 and 2012, respectively, is not included in the table above.

Accrued liabilities consist of the following (in thousands):

	Year Ended June 30,
	2013		2012
Customer refunds	$	1,064	$	—
Accrued other liabilities		739		640
Sales tax payable		432		596
Customer advances		211		203
Accrued rent		32		110
Accrued liabilities	$	2,478	$	1,549