XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.23.3

Revenue - Contract Balances (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Sep. 30, 2022
Change In Contract With Customer, Assets [Roll Forward] |  |
Contract assets - Beginning balance | $ 10,172,000 |
Additional revenue recognized over-time | 28,955,000 |
Less amounts billed to the customers | (30,108,000) |
Contract assets - Ending balance | 9,019,000 | $ 10,172,000
Change In Contract With Customer, Liability [Roll Forward] |  |
Contract liabilities (included within Accrued liabilities) - Beginning balance | (807,000) |
Payments received in advance of performance obligations | (1,531,000) |
Performance obligations satisfied | 1,435,000 |
Contract liabilities (included within Accrued liabilities) - Ending balance | (903,000) | (807,000)
Impairment loss on contract assets | $ 0 | $ 0

X
- Definition Change In Contract With Customer, Assets [Roll Forward] + References No definition available. + Details
Name: | sif_ChangeInContractWithCustomerAssetsRollForward
Namespace Prefix: | sif_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change In Contract With Customer, Liability [Roll Forward] + References No definition available. + Details
Name: | sif_ChangeInContractWithCustomerLiabilityRollForward
Namespace Prefix: | sif_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contract With Customer, Asset, Additional Revenue Recognized + References No definition available. + Details
Name: | sif_ContractWithCustomerAssetAdditionalRevenueRecognized
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract With Customer, Asset, Amounts Billed To Customers + References No definition available. + Details
Name: | sif_ContractWithCustomerAssetAmountsBilledToCustomers
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract with Customer, Liability, Including New Contract Revenue, Recognized + References No definition available. + Details
Name: | sif_ContractWithCustomerLiabilityIncludingNewContractRevenueRecognized
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contract With Customer, Liability, Payments Received In Advance Of Performance Obligations + References No definition available. + Details
Name: | sif_ContractWithCustomerLiabilityPaymentsReceivedInAdvanceOfPerformanceObligations
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479483/340-40-50-3 + Details
Name: | us-gaap_CapitalizedContractCostImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
Name: | us-gaap_ContractWithCustomerAssetNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant