Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_BusinessAcquisitionAxis=slgd_ParamountChemicalSpecialtiesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=slgd_FormulasAndBatchingProcessesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=slgd_CRBrandsAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisition - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 01, 2020	Oct. 01, 2019
Paramount
Business Acquisition [Line Items]
Intangible Assets		$ 3,595
Paramount \| Customer Relationships
Business Acquisition [Line Items]
Intangible Assets		$ 2,330
Paramount \| Customer Relationships \| Minimum
Business Acquisition [Line Items]
Useful Life		10 years
Paramount \| Customer Relationships \| Maximum
Business Acquisition [Line Items]
Useful Life		13 years
Paramount \| Trade Names
Business Acquisition [Line Items]
Intangible Assets		$ 880
Paramount \| Trade Names \| Minimum
Business Acquisition [Line Items]
Useful Life		10 years
Paramount \| Trade Names \| Maximum
Business Acquisition [Line Items]
Useful Life		25 years
Paramount \| Formulas and Batching Processes
Business Acquisition [Line Items]
Intangible Assets		$ 370
Useful Life		10 years
Paramount \| Non-compete
Business Acquisition [Line Items]
Intangible Assets		$ 15
Useful Life		5 years
CR Brands Acquisition
Business Acquisition [Line Items]
Intangible Assets	$ 7,235
CR Brands Acquisition \| Customer Relationships
Business Acquisition [Line Items]
Intangible Assets	$ 4,500
Useful Life	9 years
CR Brands Acquisition \| Trade Names
Business Acquisition [Line Items]
Intangible Assets	$ 1,780
Useful Life	20 years
CR Brands Acquisition \| Formulas and Batching Processes
Business Acquisition [Line Items]
Intangible Assets	$ 930
Useful Life	8 years
CR Brands Acquisition \| Non-compete
Business Acquisition [Line Items]
Intangible Assets	$ 25
Useful Life	5 years