XML 58 R42.htm IDEA: XBRL DOCUMENT
v3.23.4

Inventories - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Inventory Disclosure [Abstract] |  |
Additional amount that would have been reported in inventory if FIFO method had been used | $ 9,634 | $ 9,939
LIFO (benefit) expense | (305) | 729
Cost of goods sold | 1,476 | 180
Net realizable value reserves | 669 | 1,538
Obsolete and excess inventory valuation reserves, net of writedown | 3,380 | 3,546
Idle costs | $ 2,149 | $ 3,087

X
- Definition Inventory, Idle Costs + References No definition available. + Details
Name: | sif_InventoryIdleCosts
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Inventory, Obsolete And Excess Inventory Valuation Reserves + References No definition available. + Details
Name: | sif_InventoryObsoleteAndExcessInventoryValuationReserves
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Inventory Valuation Reserves, Net Of Writedown + References No definition available. + Details
Name: | sif_InventoryValuationReservesNetOfWritedown
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The effect of liquidating LIFO (last in first out) inventory layers on income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 330 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SAB Topic 11.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480581/330-10-S99-3 + Details
Name: | us-gaap_EffectOfLIFOInventoryLiquidationOnIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The change in the inventory reserve representing the cumulative difference in cost between the first in, first out and the last in, first out inventory valuation methods, which change has been reflected in the statement of income during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 330 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480581/330-10-S99-1 + Details
Name: | us-gaap_InventoryLIFOReservePeriodCharge
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration