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, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Operating (loss) income | $ (4,696,550) | $ (2,579,233) | $ (12,133,132) | $ (4,453,923) |
| Revenues | 2,572,872 | 2,405,519 | 5,159,485 | 5,649,118 |
| Operating Segments [Member] | ||||
| Operating (loss) income | (4,697,000) | (2,579,000) | (12,133,000) | (4,454,000) |
| Revenues | 2,573,000 | 2,406,000 | 5,159,000 | 5,649,000 |
| Commercial [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | (163,000) | 483,000 | (19,000) | 1,431,000 |
| Research and Development [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | (1,960,000) | (1,155,000) | (3,992,000) | (1,314,000) |
| Corporate [Member] | Operating Segments [Member] | ||||
| Operating (loss) income | (2,574,000) | (1,907,000) | (8,122,000) | (4,571,000) |
| U.S. [Member] | Operating Segments [Member] | ||||
| Revenues | 981,000 | 379,000 | 1,975,000 | 737,000 |
| South Africa [Member] | Operating Segments [Member] | ||||
| Revenues | 715,000 | 120,000 | 1,033,000 | 636,000 |
| Zimbabwe [Member] | Operating Segments [Member] | ||||
| Revenues | 378,000 | 515,000 | 678,000 | 1,031,000 |
| Cameroon [Member] | Operating Segments [Member] | ||||
| Revenues | 891,000 | |||
| Peru [Member] | Operating Segments [Member] | ||||
| Revenues | 282,000 | |||
| United Arab Emirates [Member] | Operating Segments [Member] | ||||
| Revenues | 278,000 | 278,000 | ||
| Other [Member] | Operating Segments [Member] | ||||
| Revenues | $ 221,000 | $ 1,392,000 | $ 913,000 | $ 2,354,000 |