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Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Allowance for doubtful accounts |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance | $ 592 | $ 520
Additions (Reductions) Charged to Expense | (80) | 39
Additions (Reductions) Charged to Other Accounts | 0 | 0
Deductions | (263) | 33
Valuation allowances and reserves, ending balance | 249 | 592
Inventory obsolescence reserve |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance | 3,335 |
Additions (Reductions) Charged to Expense | 518 | 517
Additions (Reductions) Charged to Other Accounts | (151) | (106)
Deductions | (26) | (632)
Valuation allowances and reserves, ending balance | 3,676 | 3,335
Inventory LIFO reserve |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance | 8,296 |
Additions (Reductions) Charged to Expense | (10) | (75)
Additions (Reductions) Charged to Other Accounts | 0 | 0
Deductions | 0 | 0
Valuation allowances and reserves, ending balance | 8,286 | 8,296
Deferred tax valuation allowance |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance | 7,557 | 8,400
Additions (Reductions) Charged to Expense | (2,362) | (1,817)
Additions (Reductions) Charged to Other Accounts | 134 | 974
Deductions | 0 | 0
Valuation allowances and reserves, ending balance | 5,329 | 7,557
Workers’ compensation reserve |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance | 181 | 136
Additions (Reductions) Charged to Expense | 703 | 395
Additions (Reductions) Charged to Other Accounts | 0 | 0
Deductions | (338) | (350)
Valuation allowances and reserves, ending balance | $ 546 | 181
Accounting Standards Update 2014-09 | Inventory obsolescence reserve |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance |  | 3,556
Accounting Standards Update 2014-09 | Inventory LIFO reserve |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |
Valuation allowances and reserves, beginning balance |  | $ 8,371

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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