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 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Operating (loss) income $ (4,964,728) $ (1,266,136) $ (17,097,860) $ (5,720,059)
Revenues 5,501,730 4,314,068 10,661,215 9,963,186
Operating Segments [Member]        
Operating (loss) income (4,965,000) (1,266,000) (17,098,000) (5,720,000)
Revenues 5,502,000 4,314,000 10,661,000 9,963,000
Commercial [Member] | Operating Segments [Member]        
Operating (loss) income 1,328,000 1,099,000 1,309,000 2,531,000
Research and Development [Member] | Operating Segments [Member]        
Operating (loss) income (3,787,000) (421,000) (7,780,000) (1,735,000)
Corporate [Member] | Operating Segments [Member]        
Operating (loss) income (2,506,000) (1,944,000) (10,627,000) (6,516,000)
U.S. [Member] | Operating Segments [Member]        
Revenues 641,000 53,000 2,616,000 790,000
South Africa [Member] | Operating Segments [Member]        
Revenues 1,791,000 199,000 2,824,000 955,000
Zimbabwe [Member] | Operating Segments [Member]        
Revenues 372,000 240,000 1,050,000 1,271,000
Mozambique [Member] | Operating Segments [Member]        
Revenues 127,000 1,430,000 127,000 1,430,000
Other [Member] | Operating Segments [Member]        
Revenues $ 2,571,000 $ 2,392,000 $ 4,044,000 $ 5,517,000