Inventories (Tables)

6 Months Ended

Jan. 31, 2012

Inventories [Abstract]

Inventories

	January 31, 2012	July 31, 2011
Raw materials and components	$  56,919,000	53,678,000
Work-in-process and finished goods	33,460,000	34,299,000
Total inventories	90,379,000	87,977,000
Less reserve for excess and obsolete inventories	15,172,000	13,316,000
Inventories, net	$  75,207,000	74,661,000