Debt instrument covenant minimum credit outstanding.

No definition available.

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Namespace Prefix:	iron_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument covenant minimum market capitalization.

+ References

No definition available.

+ Details

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Namespace Prefix:	iron_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Final end of term charge accrued.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility additional borrowing capacity.

+ References

No definition available.

+ Details

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Namespace Prefix:	iron_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility initial borrowing capacity.

+ References

No definition available.

+ Details

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Namespace Prefix:	iron_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Loan prepayment charge, percentage.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Loan prepayment charge percentage after eighteen months.

+ References

No definition available.

+ Details

Name:	iron_LoanPrepaymentChargePercentageAfterEighteenMonths
Namespace Prefix:	iron_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Loan prepayment charge percentage thereafter.

+ References

No definition available.

+ Details

Name:	iron_LoanPrepaymentChargePercentageThereafter
Namespace Prefix:	iron_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Term loan exit fee rate

+ References

No definition available.

+ Details

Name:	iron_TermLoanExitFeeRate
Namespace Prefix:	iron_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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-Section S99
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+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
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-Publisher FASB
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+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=iron_TermLoanMember
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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- Details

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Long-Term Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Nov. 06, 2024	Jun. 30, 2025	Jun. 30, 2025
Term Loan [Member]
Line Of Credit Facility [Line Items]
Debt discount and debt issuance costs		$ 1,550	$ 1,550
Final end of term charge accrued	$ 2,000
Term Loan [Member] \| Hercules Loan Agreement [Member]
Line Of Credit Facility [Line Items]
Term loan facility	200,000
Borrowed an initial term loan facility	$ 30,000
Maturity Date	Dec. 01, 2029
Interest Rate	8.25%
Prepayment charge, percentage	3.00%
Prepayment Charge, Percentage After Eighteen Months	2.00%
Prepayment Charge, Percentage Thereafter	1.00%
Term loan exit fee rate	6.75%
Debt discount and debt issuance costs	$ 1,800
Unamortized deferred financing costs		600	600
Interest expense		$ 900	$ 1,800
Term Loan [Member] \| Hercules Loan Agreement [Member] \| Prime Rate [Member]
Line Of Credit Facility [Line Items]
Interest Rate	1.75%
Term Loan [Member] \| Hercules Loan Agreement [Member] \| Minimum [Member]
Line Of Credit Facility [Line Items]
Aggregate minimum principal amount	$ 50,000
Market capitalization covenant	1,000,000
Tranche One [Member] \| Hercules Loan Agreement [Member]
Line Of Credit Facility [Line Items]
Additional term loan	80,000
Tranche Two and Three [Member] \| Term Loan [Member] \| Hercules Loan Agreement [Member]
Line Of Credit Facility [Line Items]
Additional term loan	65,000
Tranche Four [Member] \| Term Loan [Member] \| Hercules Loan Agreement [Member]
Line Of Credit Facility [Line Items]
Additional term loan	$ 25,000