Name:	slnd_DenominatorAbstract
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Data Type:	xbrli:stringItemType
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Period Type:	duration

The amount of net income (loss) for the period per each founder share of common stock or unit outstanding during the reporting period.

No definition available.

Name:	slnd_EarningsPerShareBasicFounderShares
Namespace Prefix:	slnd_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The amount of net income (loss) for the period per each public share of common stock or unit outstanding during the reporting period.

No definition available.

Name:	slnd_EarningsPerShareBasicPublicShares
Namespace Prefix:	slnd_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The amount of net income (loss) for the period available to each founder share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.

Name:	slnd_EarningsPerShareDilutedFounderShares
Namespace Prefix:	slnd_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The amount of net income (loss) for the period available to public share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.

Name:	slnd_EarningsPerShareDilutedPublicShares
Namespace Prefix:	slnd_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
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- References

No definition available.

Name:	slnd_NumeratorAbstract
Namespace Prefix:	slnd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256