Note 9 - Income Taxes (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
Sep. 30, 2017 |
|
| Income Tax Expense (Benefit), Total | $ (101,000) | $ 433,000 | $ (304,000) | $ 800,000 | |
| Effective Income Tax Rate Reconciliation, Percent, Total | 24.90% | 32.30% | (91.10%) | 31.00% | |
| Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability | $ (384,000) | ||||
| Unrecognized Tax Benefits, Ending Balance | $ 0 | 0 | |||
| State and Local Jurisdiction [Member] | |||||
| Operating Loss Carryforwards, Valuation Allowance, Total | $ 191,000 | 191,000 | $ 159,000 | ||
| State and Local Jurisdiction [Member] | Deferred Tax Assets Related to Operating Loss Carryforwards [Member] | |||||
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 32,000 | ||||
| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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