Additional information for certain balance sheet accounts is as follows for the years ended:


	July 31,
	2012		2011
Accounts receivable, net of allowance:
Billed	$	91,143	$	81,314
Unbilled (A)		4,974		7,244

	$	96,117	$	88,558

Inventories:
Raw materials	$	73,657	$	75,434
Work-in-process		9,994		10,544
Finished goods		25,293		19,505

	$	108,944	$	105,483

Accrued liabilities:
Accrued employee compensation and benefits	$	25,153	$	21,521
Accrued restructuring charges		277		5,190
Accrued warranty		5,634		5,174
Other		10,682		9,553

	$	41,746	$	41,438

Advance payments and deferred revenue:
Deferred revenue (B)	$	11,551	$	7,380
Customer deposits		2,772		1,869

	$	14,323	$	9,249

(A)	Total unbilled receivables at July 31, 2012 and 2011 were $7,653 and $11,617, respectively. At July 31, 2012 and 2011, the long-term portion of unbilled receivables of $2,678 and $4,373, respectively, was included in non-current other assets.

(B)	Total deferred revenue at July 31, 2012 and 2011 was $12,267 and $8,289, respectively. At July 31, 2012 and 2011, the long-term portion of deferred revenue of $716 and $909, respectively, was included in non-current other liabilities.