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, 2018
Dec. 31, 2017
Revenues $ 6,371,809 $ 2,586,613
Operating (loss) income (1,011,727) (7,436,581)
Operating Segments [Member]    
Revenues 6,372,000 2,587,000
Operating (loss) income (1,012,000) (7,437,000)
Commercial [Member] | Operating Segments [Member]    
Operating (loss) income 3,728,000 116,000
Research and Development [Member] | Operating Segments [Member]    
Operating (loss) income (2,362,000) (1,951,000)
Corporate [Member] | Operating Segments [Member]    
Operating (loss) income (2,378,000) (5,602,000)
U.S. [Member] | Operating Segments [Member]    
Revenues 3,010,000 994,000
South Africa [Member] | Operating Segments [Member]    
Revenues 209,000 318,000
Zimbabwe [Member] | Operating Segments [Member]    
Revenues 1,358,000 300,000
Mozambique [Member] | Operating Segments [Member]    
Revenues 460,000  
Nigeria [Member] | Operating Segments [Member]    
Revenues 750,000  
Other Countries [Member] | Operating Segments [Member]    
Revenues $ 585,000 $ 975,000