9. Balance sheet information:

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


	January 31, 2012		July 31, 2011
Accounts receivable, net of allowance:
Billed	$	72,004	$	81,314
Unbilled (A)		5,960		7,244

	$	77,964	$	88,558

Inventories:
Raw materials	$	70,413	$	75,434
Work-in-process		10,701		10,544
Finished goods		22,654		19,505

	$	103,768	$	105,483

Accrued liabilities:
Accrued employee compensation and benefits	$	17,627	$	21,521
Accrued restructuring charges		1,953		5,190
Accrued warranty		5,767		5,174
Other		7,090		9,553

	$	32,437	$	41,438

Advance payments and deferred revenue:
Deferred revenue	$	8,201	$	7,380
Customer deposits		2,183		1,869

	$	10,384	$	9,249

(A)	Total unbilled receivables at January 31, 2012 and July 31, 2011 were $9,761 and $11,617, respectively. At January 31, 2012 and July 31, 2011, the long-term portion of unbilled receivables of $3,801 and $4,373, respectively, was included in non-current other assets.