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Note 10 - Debt (Details Textual) - The Facility [Member] - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Dec. 21, 2018 | Mar. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2019
Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 165.0 |  |  |  |
Debt Issuance Costs, Net, Total | 0.6 |  |  |  |
Proceeds from Long-term Lines of Credit |  | $ 100.0 |  |  |
Repayments of Long-term Lines of Credit |  |  | $ 50.0 | $ 50.0 |
Interest Expense, Debt, Total |  |  | 0.3 |  | $ 0.1
Debt Covenant, Fixed Charge Coverage Ratio, Maximum Unused Availability | $ 18.5 |  |  |  |
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio | 1.0 |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | 104.5 | 58.9 |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.50% |  |  |  |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |  |  |  |
Revolving Credit Facility [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |
Standby Letters of Credit [Member] |  |  |  |  |
Letters of Credit Outstanding, Amount |  |  | $ 5.0 | $ 5.8 |

X
- Definition The maximum amount of unused availability under the credit facility that may be held before the fixed charge coverage ratio will apply. + References No definition available. + Details
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- Definition The minimum fixed charge coverage ratio required by the debt agreement. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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