10. Balance sheet information:

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


	April 30, 2012		July 31, 2011
Accounts receivable, net of allowance:
Billed	$	72,353	$	81,314
Unbilled (A)		6,014		7,244

	$	78,367	$	88,558

Inventories:
Raw materials	$	79,156	$	75,434
Work-in-process		9,477		10,544
Finished goods		24,985		19,505

	$	113,618	$	105,483

Accrued liabilities:
Accrued employee compensation and benefits	$	20,105	$	21,521
Accrued restructuring charges		1,105		5,190
Accrued warranty		6,026		5,174
Other		7,821		9,553

	$	35,057	$	41,438

Advance payments and deferred revenue:
Deferred revenue	$	10,936	$	7,380
Customer deposits		2,009		1,869

	$	12,945	$	9,249

(A)	Total unbilled receivables at April 30, 2012 and July 31, 2011 were $9,317 and $11,617, respectively. At April 30, 2012 and July 31, 2011, the long-term portion of unbilled receivables of $3,303 and $4,373, respectively, was included in non-current other assets.