The number of warrants or rights exercised during period.

No definition available.

Name:	smhi_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix:	smhi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock issued during period shares warrants exercised shares withheld as payment of exercise.

+ References

No definition available.

+ Details

Name:	smhi_StockIssuedDuringPeriodSharesWarrantsExercisedSharesWithHeldAsPaymentOfExercise
Namespace Prefix:	smhi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=smhi_WarrantsTransactionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Warrants - Additional Information (Details) - $ / shares	Jan. 17, 2023	Mar. 31, 2023	Dec. 31, 2022
Class of Warrant or Right [Line Items]
Class of warrant or right, exercise price of warrants or rights		$ 0.01
Class of Warrant or Right, Outstanding		1,321,968
Number of shares withheld in an exercise to purchase warrants as payment for the exercise	121
Warrants Transactions
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			2,560,456
Class of warrant or right, exercise price of warrants or rights		$ 0.01
Class of warrant or right, exercised during period	117,515