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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Income Tax Disclosure [Abstract] |  |  |
Statutory income tax amount | $ 1,001 | $ 2,917 | $ 5,548
State taxes, net of federal benefits | (312) | (125) | 204
Manufacturing deduction | (364) | (150) | (450)
Meals and entertainment | 82 | 63 | 55
Transaction costs | 79 | 0 | 0
Employee stock purchase plan | 56 | 79 | 83
Foreign operations | (3) | 218 | 276
Valuation allowance - current year increase | 275 | 159 | (43)
Utilization of tax credits | (1,609) | (1,168) | (1,116)
Valuation allowance | (1,317) | 0 | 0
Discrete tax benefits | (765) | (954) | (1,461)
One-time transition tax | 250 | 0 | 0
Deferred balance sheet remeasure | 2,727 | 0 | 0
ASU 2016-09 excess stock compensation | 643 | 0 | 0
Contingent consideration | 388 | (1,172) | (154)
Adjustment of tax contingency reserves | 315 | 257 | 202
Other, net | 41 | 1 | 68
Income tax provision | $ 1,487 | $ 125 | $ 3,212

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to excess tax benefit for share-based compensation cost. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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