Annual report pursuant to Section 13 and 15(d)

Industry Segments And Financial Information About Foreign And Domestic Operations (Details)

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Industry Segments And Financial Information About Foreign And Domestic Operations (Details) (USD $)
 12 Months Ended
Sep. 30, 2014
segment
Sep. 30, 2013
Sep. 30, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of reportable segments 1    
Net Revenues to External Customers $ 24,491,000 $ 31,457,000 $ 35,034,000
Long-Lived Asset 1,768,000 2,233,000  
South Africa [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 2,928,000 [1] 5,421,000 [1] 6,834,000 [1]
Angola [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 2,477,000 [1]    [2]    [2]
U.S. [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 2,381,000 2,611,000 2,423,000
Long-Lived Asset 88,000 154,000  
DR of Congo [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 2,185,000 2,467,000    [2]
Zimbabwe [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 2,064,000    [2]    [2]
Tanzania [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 1,936,000    [2]    [2]
Nigeria [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers    [2] 2,879,000    [2]
Uganda [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers    [2] 2,997,000    [2]
Brazil [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers    [2] 4,480,000 [1] 6,720,000 [1]
U.K. [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers    [2]    [2]    [2]
Long-Lived Asset 152,000 181,000  
Malaysia [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers    [2]    [2]    [2]
Long-Lived Asset 1,528,000 1,853,000  
Other Countries [Member]
      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net Revenues to External Customers 10,520,000 10,602,000 19,057,000
Long-Lived Asset   $ 45,000  
[1] Exceeds 10 percent of total net revenues.
[2] Less than 5 percent of total net revenues.