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Note 16 - Transactions with Related Parties (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 48 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 45 Months Ended 12 Months Ended
Oct. 31, 2008
Phase One [Member]
Hirair Hovnanian [Member]
Oct. 31, 2011
Phase One [Member]
Hirair Hovnanian [Member]
Oct. 31, 2010
Phase Two [Member]
Hirair Hovnanian [Member]
Oct. 31, 2010
Phase Three [Member]
Hirair Hovnanian [Member]
Oct. 31, 2011
Phase Four [Member]
Hirair Hovnanian [Member]
Dec. 31, 2005
Hirair Hovnanian [Member]
Oct. 31, 2003
Hirair Hovnanian [Member]
Oct. 31, 2011
Hirair Hovnanian [Member]
Oct. 31, 2012
Hirair Hovnanian [Member]
Oct. 31, 2012
Tavit Najarian [Member]
Oct. 31, 2011
Tavit Najarian [Member]
Oct. 31, 2010
Tavit Najarian [Member]
Oct. 31, 2012
Mazin Kalian [Member]
Oct. 31, 2011
Mazin Kalian [Member]
Related Party Transaction, Agreement with Related Party           $ 25.0 $ 31.4              
Related Party Transaction, Option Deposit with Related Party                 3.0          
Related Party Transaction, Amounts of Transaction               $ 29.2   $ 0.9 $ 1.0 $ 1.3 $ 0.1 $ 0.2
Related Party Transaction, Number of Phases           4                
Related Party Transaction, Duration           3 years                
Number of Real Estate Properties Purchased from Related Parties 43 86 83 84 137