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Contract Services and Advanced Technology Costs (Narrative) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Contract monthly revenue |  |  | $ 2.0 |
Contract revenue current work | $ 24.2 |  |  |
Contract revenue past work | $ 8.1 |  |  |
2018 ORNL Contract [Member] | Scenario, Forecast [Member] |  |  |  |
Contract value |  | $ 16.0 |  |
2017 ORNL Contract [Member] |  |  |  |
Contract value |  |  | 25.0 |
Contract milestone payments |  |  | $ 1.0 |
2016 ORNL Contract [Member] |  |  |  |
Contract monthly revenue |  |  |  | $ 2.7

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- Definition Contract milestone payments + References No definition available. + Details
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- Details
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- Details
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