Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

+ Details

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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

- References

No definition available.

+ Details

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

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=onew_IncrementalTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=onew_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_TermNotePayableSecuredDebtDueJulyTwentyTwoThousandTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_RevolvingNotePayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableSecuredDebtRangingZeroPointZeroToEightPointNinePercentDueJulyTwoThousandTwentyEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableUnsecuredDebtFivePointFivePercentDueFebruaryFirstTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableUnsecuredDebtFivePointFivePercentDueDecemberFirstTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableUnsecuredDebtFivePointZeroPercentDueFebruaryFirstTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableUnsecuredDebtFourPointZeroPercentDueDecemberFirstTwoThousandTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=onew_NotePayableUnsecuredDebtFivePointZeroPercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term Debt and Line of Credit (Details) - USD ($) $ in Thousands		3 Months Ended
	Nov. 30, 2021	Dec. 31, 2021	Sep. 30, 2021	Jul. 22, 2020
Long-term Debt and Line of Credit [Abstract]
Long-term debt, gross		$ 352,385	$ 116,534
Less current portion (net of debt issuance costs)		(19,420)	(11,366)
Less unamortized portion of debt issuance costs		(5,957)	(2,094)
Long-term debt, net of current portion of unamortized debt issuance costs		$ 327,008	$ 103,074
Revolving Credit Facility [Member]
Long-term Debt and Line of Credit [Abstract]
Aggregate principal amount				$ 30,000
Increase in revolving commitment	$ 20,000
Incremental Term Loan [Member]
Long-term Debt and Line of Credit [Abstract]
Aggregate principal amount	$ 200,000
Term Loan [Member]
Long-term Debt and Line of Credit [Abstract]
Aggregate principal amount				$ 110,000
Term Note Payable to Truist Bank, Secured and Bearing Interest at 3.0% at December 31, 2021 and 2.75% at September 30, 2021. The Note Requires Quarterly Principal Payments, Maturing with a Full Repayment on July 22, 2025 [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		3.00%	2.75%
Maturity date		Jul. 22, 2025
Long-term debt, gross		$ 301,903	$ 105,875
Revolving Note Payable for an Amount up to $50.0 Million to Truist Bank, Secured and Bearing Interest at 3.0% at December 31, 2021. The Note Requires Full Repayment on July 22, 2025 [Member]
Long-term Debt and Line of Credit [Abstract]
Aggregate principal amount		$ 50,000
Interest rate		3.00%
Maturity date		Jul. 22, 2025
Long-term debt, gross		$ 40,000	0
Note Payable to Commercial Vehicle Lenders Secured by the Value of the Vehicles Bearing Interest at Rates Ranging from 0.0% to 8.9% Per Annum. The Note Requires Monthly Installment Payments of Principal and Interest Ranging from $100 to $5,600 through July 2028 [Member]
Long-term Debt and Line of Credit [Abstract]
Maturity date		Jul. 31, 2028
Frequency of periodic payment		monthly
Long-term debt, gross		$ 3,216	3,248
Note Payable to Commercial Vehicle Lenders Secured by the Value of the Vehicles Bearing Interest at Rates Ranging from 0.0% to 8.9% Per Annum. The Note Requires Monthly Installment Payments of Principal and Interest Ranging from $100 to $5,600 through July 2028 [Member] \| Minimum [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		0.00%
Monthly installment payment amount		$ 100
Note Payable to Commercial Vehicle Lenders Secured by the Value of the Vehicles Bearing Interest at Rates Ranging from 0.0% to 8.9% Per Annum. The Note Requires Monthly Installment Payments of Principal and Interest Ranging from $100 to $5,600 through July 2028 [Member] \| Maximum [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		8.90%
Monthly installment payment amount		$ 5,600
Note Payable to Central Marine Services, Inc., Unsecured and Bearing Interest at 5.5% Per Annum. The Note Requires Monthly Interest Payments, with a Balloon Payment of Principal Due On February 1, 2022 [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		5.50%
Maturity date		Feb. 01, 2022
Long-term debt, gross		$ 2,164	2,164
Note Payable To Tom George Yacht Sales, Inc., Unsecured and Bearing Interest At 5.5% Per Annum. The Note Requires Quarterly Interest Payments, With a Balloon Payment of Principal Due On December 1, 2023 [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		5.50%
Maturity date		Dec. 01, 2023
Long-term debt, gross		$ 2,056	2,056
Note Payable to Ocean Blue Yacht Sales, Unsecured and Bearing Interest at 5.0% Per Annum. The Note Requires Quarterly Interest Payments, with a Balloon Payment of Principal Due on February 1, 2022 [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		5.00%
Maturity date		Feb. 01, 2022
Long-term debt, gross		$ 1,920	1,920
Note Payable to Norfolk Marine Company, Unsecured and Bearing Interest at 4.0% Per Annum. The Note Requires Quarterly Interest Payments, with a Balloon Payment of Principal Due on December 1, 2024 [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		4.00%
Maturity date		Dec. 01, 2024
Long-term debt, gross		$ 1,126	0
Note Payable to Slalom Shop, LLC, Unsecured and Bearing Interest at 5.0% Per Annum. The Note was Repaid in Full [Member]
Long-term Debt and Line of Credit [Abstract]
Interest rate		5.00%
Long-term debt, gross		$ 0	$ 1,271