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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Income Tax Disclosure [Abstract] |  |  |
Statutory income tax amount | $ 5,233 | $ 3,912 | $ 1,890
State taxes, net of federal benefits | 636 | 85 | 319
Transaction costs | 0 | 2 | 60
Employee stock purchase plan | 165 | 98 | 79
Foreign operations | 984 | 1,552 | 556
Non-deductible executive compensation | 373 | 291 | 150
Change in valuation allowance | 0 | 0 | (2,187)
Effective Income Tax Rate Reconciliation, Capital Loss Expiration | 0 | 0 | 2,301
Utilization of research and development tax credits | (4,678) | (2,780) | (3,116)
Deferred balance sheet remeasure | 0 | 0 | (952)
ASU 2016-09 excess stock compensation | (1,678) | (2,967) | (1,131)
Contingent consideration | 0 | (1,239) | 1,212
Changes from provision to return | 181 | 413 | (458)
Adjustment of tax contingency reserves | 238 | 417 | 329
U.S. deduction for foreign export sales | (1,419) | (584) | (630)
Effective Income Tax Rate Reconciliation, GILTI, Amount | 0 | 0 | 33
Other, net | 113 | 45 | 178
Income tax (benefit) expense | $ 148 | $ (755) | $ (1,367)

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- Definition Amount of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to global intangible low-taxed income (GILTI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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