9. Balance sheet information:

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


	October 31, 2011		July 31, 2011
Accounts receivable, net of allowance:
Billed	$	77,603	$	81,314
Unbilled (A)		8,279		7,244
	$	85,882	$	88,558
Inventories:
Raw materials	$	73,851	$	75,434
Work-in-process		12,213		10,544
Finished goods		23,468		19,505
	$	109,532	$	105,483
Accrued liabilities:
Accrued employee compensation and benefits	$	15,432	$	21,521
Accrued restructuring charges		3,016		5,190
Accrued warranty		5,250		5,174
Other		9,015		9,553
	$	32,713	$	41,438
Advance payments and deferred revenue:
Deferred revenue	$	7,169	$	7,380
Customer deposits		2,286		1,869
	$	9,455	$	9,249

(A)	Total unbilled receivables at October 31, 2011 and July 31, 2011 were $11,190 and $11,617, respectively. At October 31, 2011 and July 31, 2011, the long-term portion of unbilled receivables of $2,911 and $4,373, respectively, was included in non-current other assets.