Quarterly report pursuant to Section 13 or 15(d)

Industry Segments and Financial Information About Foreign and Domestic Operations (Schedule Of Operations By Geographic Area) (Details)

v3.7.0.1
Industry Segments and Financial Information About Foreign and Domestic Operations (Schedule Of Operations By Geographic Area) (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
Mar. 31, 2016
USD ($)
Mar. 31, 2017
USD ($)
segment
customer
Mar. 31, 2016
USD ($)
customer
Sep. 30, 2016
USD ($)
customer
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Reportable Segments | segment     1    
Net revenues to external customers $ 2,405,519 $ 4,772,801 $ 5,649,118 $ 13,003,460  
Total Revenue [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Customers | customer     0   0
Concentration risk, percentage     10.00%   10.00%
Net Revenues Less Than Five Percent [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     5.00%    
Net Revenues Exceeding Ten Percent [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     10.00%    
Zimbabwe [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers [1]     $ 1,031,000 1,652,000  
Cameroon [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     891,000 [1] [2]  
U.S. [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     737,000 [1] 1,293,000  
Long-Lived Asset 35,741,000   35,741,000   $ 7,963,000
South Africa [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     636,000 [1] [2]  
Ethiopia [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     333,000 [2]  
Brazil [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     [2] 6,008,000 [1]  
Malaysia [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers [2]      
Long-Lived Asset 641,000   641,000   796,000
U.K. [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers [2]      
Long-Lived Asset $ 83,000   83,000   $ 93,000
Other Countries [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net revenues to external customers     $ 2,021,000 $ 4,050,000  
Customer One [Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Customers | customer         1
Concentration risk, percentage         49.00%
Customer One [Member] | Accounts Receivable and Other Long-Term Receivables [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Customers | customer     1   1
Concentration risk, percentage     86.00%   85.00%
Two Customers[Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Customers | customer     2    
Customer One of Two Customers [Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     45.00%    
Customer Two of Two Customers [Member] | Accounts Receivable [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage     11.00%    
Three Customers [Member] | Total Revenue [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of Customers | customer     3 3  
Concentration risk, percentage     10.00% 10.00%  
[1] Countries exceeding 10 percent of total net revenues
[2] * Countries with less than 5 percent of total net revenues