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Credit Facilities - Loan Facilities and Subordinated Debt (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Sep. 30, 2017
London Interbank Offered Rate (LIBOR) [Member] |  |
Line of Credit Facility [Line Items] |  |
Interest rate (percent) | 1.66% |
Term Loans | Term Loan with Fifth Third Bank |  |
Line of Credit Facility [Line Items] |  |
Maximum availability | $ 25,000,000.0 |
Number of equal installment payments | 59 months |
Periodic principal payment | $ 312,500 |
Line of Credit |  |
Line of Credit Facility [Line Items] |  |
Maximum availability | 10,000,000 |
Notes Payable to Banks [Member] |  |
Line of Credit Facility [Line Items] |  |
Loan balance | 14,896,000 | $ 19,688,000
Notes Payable to Banks [Member] | Term Loans |  |
Line of Credit Facility [Line Items] |  |
Maximum availability | 25,000,000 |
Loan balance | $ 14,900,000 |
Notes Payable to Banks [Member] | Term Loans | London Interbank Offered Rate (LIBOR) [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on loan | 1.66% |
Notes Payable to Banks [Member] | Line of Credit |  |
Line of Credit Facility [Line Items] |  |
Maximum availability | $ 10,000,000.0 |
Loan balance | $ 0 |
Notes Payable to Banks [Member] | Line of Credit | London Interbank Offered Rate (LIBOR) [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on loan | 1.66% |

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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, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the required periodic payment applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
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