Accounts Receivable (Tables)
 6 Months Ended
Apr. 30, 2013
Accounts Receivable [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable at April 30, 2013 and October 31, 2012 consisted of the following:
 
 
April 30, 2013
 
October 31, 2012
U.S. Government:
 
 
 
Amount billed
$
372

 
$
20

Unbilled recoverable costs
1,275

 
890

 
1,647

 
910

Commercial Customers:
 
 
 
Amount billed
14,607

 
18,786

Unbilled recoverable costs
13,139

 
6,288

 
27,746

 
25,074

 
$
29,393

 
$
25,984