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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |
Total Revenue | $ 33,752 | $ 30,215
Prime |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 33,528 |
Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 224 |
Time and materials |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 32,790 |
Cost plus fixed fee |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 609 |
Firm fixed price |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 353 |
Department of Veterans Affairs |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 22,811 |
Department of Health and Human Services |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | 10,267 |
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenue | $ 674 |

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