XML 63 R48.htm IDEA: XBRL DOCUMENT
v3.20.4

Goodwill - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 1,355,000 |  |  | $ 1,355,000 | $ 17,558,000 | $ 9,800,000
Goodwill impairment |  |  |  | 16,203,000 | 0 |
Welded Pipe And Tube |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Fair value greater than carrying value |  |  | 1.70% |  |  |
Goodwill impairment |  |  | $ 0 | 16,200,000 |  |
Metals Segment |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | 0 |  |  | 0 | 16,203,000 | 8,445,000
Goodwill impairment | 5,500,000 | $ 10,700,000 |  | 16,203,000 |  |
Metals Segment | Welded Pipe And Tube |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | 5,500,000 | 16,200,000 | $ 16,200,000 | $ 5,500,000 |  |
Goodwill impairment | $ 5,500,000 | $ 10,700,000 |  |  |  |
Reporting unit, percentage of fair value below carrying amount | 24.10% | 9.70% |  | 24.10% |  |
Specialty Chemicals Segment |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 1,355,000 |  |  | $ 1,355,000 | $ 1,355,000 | $ 1,355,000
Fair value greater than carrying value | 7.40% |  |  | 7.40% |  |
Goodwill impairment | $ 0 |  |  | $ 0 |  |
Specialty Chemicals Segment | Welded Pipe And Tube |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 1,400,000 |  |  | $ 1,400,000 |  |

X
- Definition Reporting Unit, Percentage of Fair Value Below Carrying Amount + References No definition available. + Details
Name: | synl_ReportingUnitPercentageOfFairValueBelowCarryingAmount
Namespace Prefix: | synl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266 + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of fair value of reporting unit in excess of carrying amount. + References No definition available. + Details
Name: | us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ReportingUnitAxis=synl_WeldedPipeAndTubeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=synl_MetalsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=synl_SpecialtyChemicalsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |