Inventories (Tables)

12 Months Ended

Jul. 31, 2011

Inventories, Net [Abstract]

Inventories

	2011	2010
Raw materials and components	$   53,678,000	55,380,000
Work-in-process and finished goods	34,299,000	31,973,000
Total inventories	87,977,000	87,353,000
Less reserve for excess and obsolete inventories	13,316,000	13,791,000
Inventories, net	$   74,661,000	73,562,000