Industry Segments and Financial Information About Foreign and Domestic Operations (Schedule of Segment Reporting Information) (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Revenues | $ 6,976,115 | $ 2,572,872 | $ 13,347,924 | $ 5,159,485 |
| Operating (loss) income | (2,124,590) | (4,696,550) | (3,136,317) | (12,133,132) |
| Operating Segments [Member] | ||||
| Revenues | 6,976,000 | 2,573,000 | 13,348,000 | 5,159,000 |
| Operating (loss) income | (2,125,000) | (4,697,000) | (3,136,000) | (12,133,000) |
| Commercial [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | 3,204,000 | (163,000) | 6,872,000 | (19,000) |
| Research and Development [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | (2,889,000) | (1,960,000) | (5,250,000) | (3,992,000) |
| Corporate [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | (2,440,000) | (2,574,000) | (4,758,000) | (8,122,000) |
| South Africa [Member] | Operating Segments [Member] | ||||
| Revenues | 24,000 | 715,000 | 233,000 | 1,033,000 |
| U.S. [Member] | Operating Segments [Member] | ||||
| Revenues | 2,596,000 | 981,000 | 5,646,000 | 1,975,000 |
| Zimbabwe [Member] | Operating Segments [Member] | ||||
| Revenues | 590,000 | 378,000 | 1,948,000 | 678,000 |
| Brazil [Member] | Operating Segments [Member] | ||||
| Revenues | 1,098,000 | 1,098,000 | ||
| UNITED ARAB EMIRATES | Operating Segments [Member] | ||||
| Revenues | 677,000 | 278,000 | 677,000 | 278,000 |
| Other Countries [Member] | Operating Segments [Member] | ||||
| Revenues | $ 1,991,000 | $ 221,000 | $ 3,746,000 | $ 1,195,000 |