Valuation and Qualifying Accounts and Reserves (Tables)

12 Months Ended

Jul. 31, 2013

Valuation and Qualifying Accounts [Abstract]

Schedule of valuation and qualifying accounts and reserves

Column A	Column B		Column C Additions					Column D			Column E
Description	Balance at beginning of period		Charged to cost and expenses			Charged to other accounts - describe		Transfers (deductions) - describe			Balance at end of period
Allowance for doubtful accounts receivable:
Year ended July 31,
2013	$	1,588,000	(422,000	)	(A)	—		(563,000	)	(B)	$	603,000
2012	1,220,000		458,000		(A)	—		(90,000	)	(B)	1,588,000
2011	1,127,000		244,000		(A)	—		(151,000	)	(B)	1,220,000
Inventory reserves:
Year ended July 31,
2013	$	16,286,000	2,810,000		(C)	—		(2,870,000	)	(E)	$	16,226,000
2012	13,316,000		3,862,000		(C)	2,776,000	(D)	(3,668,000	)	(E)	16,286,000
2011	13,791,000		4,091,000		(C)	—		(4,566,000	)	(E)	13,316,000
Valuation allowance for deferred tax assets:
Year ended July 31,
2013	$	1,162,000	1,063,000		(F)	—		—			$	2,225,000
2012	1,162,000		—			—		—			1,162,000
2011	1,162,000		—			—		—			1,162,000

(A) (Benefit from) provision for doubtful accounts.

(B) Write-off of uncollectible receivables.

(C) Provision for excess and obsolete inventory.

(D) Reclassification of contract loss accrued in fiscal 2011.

(E) Write-off of inventory.

(F) Change in valuation allowance.