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Supplemental Balance Sheet Disclosures (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Sep. 30, 2013
Supplemental Balance Sheet Disclosures |  |  |  |  |
Unbilled receivables, net of customer payments | $ 11,340,583 |  | $ 11,340,583 |  | $ 6,539,442
Inventories |  |  |  |  |
Raw materials | 4,609,075 |  | 4,609,075 |  | 3,126,592
Work-in-process | 1,111,548 |  | 1,111,548 |  | 857,602
Finished goods | 152,264 |  | 152,264 |  | 393,319
Inventory | 5,872,887 |  | 5,872,887 |  | 4,377,513
Prepaid expenses and other current assets |  |  |  |  |
Prepaid insurance | 394,398 |  | 394,398 |  | 350,913
Other | 324,632 |  | 324,632 |  | 291,297
Total | 719,030 |  | 719,030 |  | 642,210
Unbilled receivables |  |  |  |  |
Change in operating income resulting from revised estimates | (659,901) | (285,500) | (3,158,163) | (1,880,925) |
Contracts Accounted For Under Percentage Of Completion [Member] |  |  |  |  |
Unbilled receivables |  |  |  |  |
Change in operating income resulting from revised estimates | $ 559,000 | $ 161,000 | $ 1,172,000 | $ 364,000 |

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