Inventories (Tables)

6 Months Ended

Jan. 31, 2013

Inventory Disclosure [Abstract]

Inventories

	January 31, 2013		July 31, 2012
Raw materials and components	$	54,964,000	55,404,000
Work-in-process and finished goods	30,350,000		33,243,000
Total inventories	85,314,000		88,647,000
Less reserve for excess and obsolete inventories	15,158,000		16,286,000
Inventories, net	$	70,156,000	72,361,000