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


	January 31, 2013		July 31, 2012
Accounts receivable, net of allowance:
Billed	$	82,704	$	91,143
Unbilled (A)		3,472		4,974
	$	86,176	$	96,117
Inventory:
Raw materials	$	87,126	$	73,657
Work-in-process		9,718		9,994
Finished goods		28,822		25,293
	$	125,666	$	108,944
Accrued liabilities:
Accrued employee compensation and benefits	$	17,049	$	25,153
Accrued restructuring charges		-		277
Accrued warranty		5,457		5,634
Other		8,303		10,682
	$	30,809	$	41,746
Advance payments and deferred revenue:
Deferred revenue (B)	$	11,277	$	11,551
Customer deposits		2,597		2,772
	$	13,874	$	14,323

(A)	Total unbilled receivables at January 31, 2013 and July 31, 2012 were $6,958 and $7,652, respectively. At January 31, 2013 and July 31, 2012, the long-term portion of unbilled receivables of $3,486 and $2,679, respectively, was included in non-current other assets.

(B)	Total deferred revenue at January 31, 2013 and July 31, 2012 was $11,789 and $12,267, respectively. At January 31, 2013 and July 31, 2012, the long-term portion of deferred revenue of $512 and $716, respectively, was included in non-current other liabilities.