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Net Loss Per Share - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise of pre-funded warrants shares	1,229,224
Shares issued upon exercise of warrants	1,229,221
Pre-funded warrants outstanding	204,081

X

- Definition

Exercise of pre-funded warrants shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	iron_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Pre-funded warrants outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	iron_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Stock issued during period shares warrants exercised.

+ References

No definition available.

+ Details

Name:	iron_StockIssuedDuringPeriodSharesWarrantsExercised
Namespace Prefix:	iron_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- 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

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Namespace Prefix:	us-gaap_
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Period Type:	duration