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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Current provision (benefit): |  |  |
Federal | $ 77,244 | $ (375,936) | $ 614,729
State | (2,930) | (10,146) | 363
Total current provision (benefit) | 74,314 | (386,082) | 615,092
Deferred provision (benefit): |  |  |
Federal | 493,989 | 2,598,050 | (857,049)
State | 27 | 91,510 | (41,665)
Total deferred provision (benefit) | 494,016 | 2,689,560 | (898,714)
Total current and deferred provision (benefit) | $ 568,330 | $ 2,303,478 | $ (283,622)
Reconciliation of the statutory federal rate to the Company's effective income tax rate |  |  |
U.S. Federal statutory tax rate (as a percent) | 34.00% | 34.00% | 34.00%
State income taxes, net of federal benefit (as a percent) | 0.20% | 0.00% | 29.60%
Permanent items (as a percent) | (0.20%) | (2.50%) | 123.90%
Research and development tax credits (as a percent) | (12.60%) | 17.40% | 190.40%
Valuation allowance (as a percent) | (2.90%) | (110.00%) | 283.90%
Change in unrecognized tax benefits (as a percent) | (0.10%) | (2.60%) | (41.50%)
123R cancellations and forfeitures | 3.80% | (1.00%) | (280.00%)
Effective income tax rate (as a percent) | 22.20% | (64.70%) | 340.30%

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