Notes Payable.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of the gross cash proceeds received from any future debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	icu_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Period Type:

- Details

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Period Type:

- Details

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Notes Payable - LMFA Note Payable - Additional Information (Details) - USD ($) $ in Thousands			12 Months Ended
	Mar. 15, 2023	Oct. 28, 2022	Dec. 31, 2022	Dec. 31, 2021	Mar. 13, 2023	Nov. 02, 2022	Sep. 09, 2022
Notes Payable [Line Items]
Debt instrument, face amount			$ 63
Debt instrument, interest rate			3.75%
Notes payable current			$ 1,178	$ 0
Cash proceeds			1,878	$ 0
Subsequent Event [Member]
Notes Payable [Line Items]
Debt instrument, face amount	$ 3,261
LMFA Note Payable [Member]
Notes Payable [Line Items]
Debt instrument, face amount						$ 268	$ 700
Debt instrument, interest rate							15.00%
Notes payable current			700
Interest expense			$ 19
Line of credit facility, expiration date		Oct. 30, 2023
Percentage of the gross cash proceeds received from any future debt		5.00%
Cash proceeds		$ 500
LMFA Note Payable [Member] \| Subsequent Event [Member]
Notes Payable [Line Items]
Debt instrument, face amount					$ 100
Debt instrument, interest rate					7.00%
Line of credit facility, expiration date	Jun. 15, 2024
LMFA Note Payable [Member] \| Minimum [Member]
Notes Payable [Line Items]
Line of credit facility, interest rate during period		7.00%
Line of credit facility, interest rate at period end		15.00%
LMFA Note Payable [Member] \| Maximum [Member]
Notes Payable [Line Items]
Line of credit facility, interest rate during period		15.00%
Line of credit facility, interest rate at period end		18.00%