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Debt (Details) |  |  |  | 6 Months Ended | 9 Months Ended | 35 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2018 USD ($) | Jul. 01, 2014 | Apr. 06, 2009 USD ($) | Jun. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) covenant | Sep. 30, 2017 USD ($) | Oct. 01, 2021 | Oct. 01, 2021 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2019 | Apr. 01, 2019 USD ($) | Oct. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jul. 02, 2014 USD ($) | Apr. 01, 2010 Contract
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  | $ 42,943,000 |  |  |  |  |  |  |  | $ 47,054,000 |  |
Long-term debt, Repayment of Principal in connection with Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 17,225,000 |  |  |
Long-term Debt, Current Maturities |  |  |  |  |  |  | 22,691,000 |  |  |  |  |  |  |  | 2,482,000 |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |  |  | 20,252,000 |  |  |  |  |  |  |  | 44,572,000 |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |
Number of Financial Covenants | covenant |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Treasury Stock | $ 4,500,000 |  |  |  |  |  | $ 4,500,000 | $ 0 |  |  |  |  |  |  |  |  |
Repayments of Long-term loan |  |  |  |  |  |  | 3,975,000 | $ 8,775,000 |  |  |  |  |  |  |  |  |
Senior Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 5 years |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Line of Credit [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  | $ 40,300,000 |  |  |  |  |  |  |  | 44,275,000 |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Eurodollar Rate Loan [Member] | Minimum [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Eurodollar Rate Loan [Member] | Maximum | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 2.375% |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,500,000 |  | $ 80,000,000 |
Long-term Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Fixed Charge Coverage Ratio |  |  |  |  |  |  | 1.25 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Dispositions Not Reinvested, Percentage |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Stated Equity Issuance, Percentage |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Receipts Greater than 250 Thousand Dollars, Non-ordinary Business, Percentage |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  |  |  |  |  |  |  | $ 250,000 |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio |  |  |  |  |  |  | 2.75 |  |  |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio |  |  |  |  |  |  | 2.50 |  |  |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio |  |  |  |  |  |  | 2.00 |  |  |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period One [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio |  |  |  |  |  |  | 3.00 |  |  |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | $ 15,000,000 |  |  | 20,000,000 |  | 15,000,000 |
Line of Credit [Member] | Senior Credit Facility [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,500,000 |  | $ 65,000,000 |
Line of Credit [Member] | Senior Credit Facility [Member] | Base Rate Loan [Member] | Minimum [Member] | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |
Line of Credit [Member] | Senior Credit Facility [Member] | Base Rate Loan [Member] | Maximum | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 1.375% |  |  |  |  |  |  |  |
Mortgages [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  | $ 2,643,000 |  |  |  |  |  |  |  | $ 2,779,000 |  |
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  |  |  | $ 15,000 |  |  |  |  |  |  |  |  |  |
Number of Financial Covenants | covenant |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term If Balloon Not Considered |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant, Cash And Cash Equivalents Threshold |  |  |  |  |  |  | $ 25,000,000 |  |  |  |  |  |  |  |  |  |
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  | 6.07% |  |  |  |  |  |  |  | 6.07% |  | 6.07%
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  | 5.91% |  |  |  |  |  |  |  | 5.905% |  | 5.91%
Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio |  |  |  |  |  |  |  |  |  |  |  | 2.50 |  |  |  |  |
Scenario, Forecast [Member] | 2018 Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  | $ 844,000 | $ 703,000 | $ 563,000 |  |  |  |  |  |  |  |  |  |  |
Scenario, Forecast [Member] | Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,551,000 |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Number of Instruments Held | Contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2

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- Definition Debt Instrument, Term If Balloon Not Considered + References No definition available. + Details
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- Definition Line of Credit Facility, Covenant Compliance, Maximum Consolidated Fixed Charge Coverage Ratio + References No definition available. + Details
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- Definition Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Dispositions Not Reinvested, Percentage + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Receipts Greater than 250 Thousand Dollars, Non-ordinary Business, Percentage + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Provision, Net Cash Proceeds from Stated Equity Issuance, Percentage + References No definition available. + Details
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- Definition Long-term debt, Repayment of Principal in connection with Amendment + References No definition available. + Details
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- Definition Number of Financial Covenants + References No definition available. + Details
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- Definition Repayments of Long-term loan + 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 Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 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 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 Amount of the required periodic payments 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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 Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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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