Basis of Presentation and Principles of Consolidation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		4 Months Ended	6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	May 23, 2012	Jul. 25, 2012
Organization, Consolidation and Presentation of Financial Statements Line Items [Line Items]
Paid in capital, post split amount				$ 7,405
Retained earnings, post split amount				25,193
Common stock oustanding, before stock split (in shares)				32,598
Common stock outstanding, post stock split (in shares)				65,196
Payments of acquisition-related contingent liability	$ 353	$ 1,867
Stock split, conversion ratio			2	2
Aerostar Integrated Systems [Member]
Organization, Consolidation and Presentation of Financial Statements Line Items [Line Items]
Joint venture, ownership percentage	75.00%