Allocation of Purchase Price at Fair Value (Detail) (USD $)	Oct. 31, 2011
Business Acquisition [Line Items]
Other assets	$ 6,000
Accounts receivable	814,000
Inventories	442,000
Property, plant and equipment	313,000
Intangible assets	2,415,000
Goodwill (all non-deductible for tax purposes)	3,076,000
Deferred tax liabilities	(1,036,000)
Net assets	5,600,000
Interest bearing
Business Acquisition [Line Items]
Liabilities	(7,000)
Non-interest bearing
Business Acquisition [Line Items]
Liabilities	$ (423,000)