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Long-Term Debt (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 26, 2021 | Jul. 31, 2017 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2016
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, balance |  |  |  | $ 8,334 |
Interest rate swap rate term |  |  | 10 years |  |
Secured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, balance |  |  | $ 400 | $ 300 |
Interest rate |  |  |  | 2.23% |
Interest rate discount |  |  | 1.00% |  |
Debt instrument, term |  |  | 15 years |  |
Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Extinguishment of debt |  | $ 2,400 |  |  |
Swap Rate | Secured Debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  | 2.40% |  |
Mortgage Note | Federal Home Loan Board Five Year Classic Advance Rate | Scenario, Forecast |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate | 240.00% |  |  |  |
BTU International, Inc (BTU) Merger | Mortgage Note |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, balance |  |  |  | $ 5,900 |
Interest rate |  |  |  |  | 4.11%
SoLayTec, B.V. |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term debt, balance |  |  |  | $ 2,100 |
Interest rate |  |  | 7.00% |  |
Additional borrowings |  |  | $ 300 |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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