Quarterly report pursuant to Section 13 or 15(d)

Industry Segments and Financial Information About Foreign and Domestic Operations (Schedule of Segment Reporting Information) (Details)

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Industry Segments and Financial Information About Foreign and Domestic Operations (Schedule of Segment Reporting Information) (Details) - USD ($)
 3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Operating (loss) income $ (7,436,581) $ (1,874,690)
Revenues 2,586,613 3,243,599
Operating Segments [Member]    
Operating (loss) income (7,437,000) (1,875,000)
Revenues 2,587,000 3,244,000
Commercial [Member] | Operating Segments [Member]    
Operating (loss) income 143,000 948,000
Research and Development [Member] | Operating Segments [Member]    
Operating (loss) income (2,032,000) (159,000)
Corporate [Member] | Operating Segments [Member]    
Operating (loss) income (5,548,000) (2,664,000)
U.S. [Member] | Operating Segments [Member]    
Revenues 994,000 358,000
South Africa [Member] | Operating Segments [Member]    
Revenues 318,000 636,000
Zimbabwe [Member] | Operating Segments [Member]    
Revenues 300,000 516,000
Peru [Member] | Operating Segments [Member]    
Revenues 282,000  
Cameroon [Member] | Operating Segments [Member]    
Revenues   891,000
Other [Member] | Operating Segments [Member]    
Revenues $ 693,000 $ 843,000