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Business Risk and Credit Risk Concentration Involving Cash (Details) - Customer concentration risk | 3 Months Ended | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2016
Next Generation Chemical Detector Partner | Revenue |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 0.00% | 62.00% |
Department of Homeland Security Science and Technology Directorate Partner | Revenue |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 0.00% | 38.00% |
Department of Homeland Security Science and Technology Directorate Partner | Accounts receivable |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 0.00% |  | 100.00%

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