Debt instrument interest only payments year and month.

No definition available.

Name:	om_DebtInstrumentInterestOnlyPaymentsYearAndMonth
Namespace Prefix:	om_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument principal payment term after interest only period expires.

+ References

No definition available.

+ Details

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Namespace Prefix:	om_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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+ Details

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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

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

- Definition

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

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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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+ Details

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

- Definition

Amount, after accumulated amortization, of debt discount.

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

Term Loan - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Jul. 02, 2020	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Principal of term loan		$ 30,000	$ 30,000
Debt discount on Perceptive Term Loan		$ 194	$ 238
SVB Term Loan
Debt Instrument [Line Items]
Principal of term loan	$ 30,000
Loan maturity date	Nov. 01, 2025
Description of payment terms		Payments under the SVB Term Loan are for interest only through May 2023, and then 30 monthly principal and interest payments from June 2023 until maturity.
Debt instrument interest only payments end date	2023-05
Debt instrument principal repayment period	30 months
Debt interest rate		5.25%
SVB Term Loan \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%