9. Balance Sheet Information:

Additional information for certain balance sheet accounts for the dates indicated is as follows:


	As of April 30, 2013		As of July 31, 2012
Accounts receivable, net of allowance:
Billed	$	82,942	$	91,143
Unbilled (A)		3,888		4,974
	$	86,830	$	96,117
Inventory:
Raw materials	$	95,041	$	73,657
Work-in-process		10,134		9,994
Finished goods		35,889		25,293
	$	141,064	$	108,944
Accrued liabilities:
Accrued employee compensation and benefits	$	20,414	$	25,153
Accrued restructuring charges		465		277
Accrued warranty		6,455		5,634
Other		10,042		10,682
	$	37,376	$	41,746
Advance payments and deferred revenue:
Deferred revenue (B)	$	10,270	$	11,551
Customer deposits		3,283		2,772
	$	13,553	$	14,323

(A)	Total unbilled receivables at April 30, 2013 and July 31, 2012 were $6,331 and $7,652, respectively. At April 30, 2013 and July 31, 2012, the long-term portion of unbilled receivables of $2,443 and $2,678, respectively, was included in non-current other assets.

(B)	Total deferred revenue at April 30, 2013 and July 31, 2012 was $11,636 and $12,267, respectively. At April 30, 2013 and July 31, 2012, the long-term portion of deferred revenue of $1,366 and $716, respectively, was included in non-current other liabilities.