Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Industry Segments and Financial Information About Foreign and Domestic Operations (Detail) - Operations by Geographic Area

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Note 7 - Industry Segments and Financial Information About Foreign and Domestic Operations (Detail) - Operations by Geographic Area (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2012
Net Revenues to External Customers $ 9,910 $ 8,634  
Long-lived Assets 2,570   2,472
South Africa [Member]
      
Net Revenues to External Customers 4,004 [1] 2,316 [2]  
Brazil [Member]
      
Net Revenues to External Customers 2,240 [2]    [3]  
United States [Member]
      
Net Revenues to External Customers 948 777  
Long-lived Assets 174   175
Uganda [Member]
      
Net Revenues to External Customers 666    [3]  
Kenya [Member]
      
Net Revenues to External Customers    [3] 998 [2]  
Zimbabwe [Member]
      
Net Revenues to External Customers    [3] 755  
Long-lived Assets        [2]
Malaysia [Member]
      
Net Revenues to External Customers    [3]    [3]  
Long-lived Assets 2,126   2,010
United Kingdom [Member]
      
Net Revenues to External Customers    [3]    [3]  
Long-lived Assets 209   220
India [Member]
      
Net Revenues to External Customers    [3]    [3]  
Long-lived Assets 61   67
Other Countries [Member]
      
Net Revenues to External Customers $ 2,052 $ 3,788  
[1] Comprised of two customers considered to be major customers (exceeds 10 percent of net revenues)
[2] Comprised of a single customer considered to be a major customer (exceeds 10 percent of net revenues).
[3] Less than 5 percent of total net revenues.