Description of Company and Basis of Presentation (Details) $ / shares in Units, $ in Millions			12 Months Ended
	Sep. 29, 2020 shares	Sep. 22, 2020 USD ($) $ / shares shares	Sep. 30, 2023 center brand location state shares	Sep. 30, 2022 shares	Sep. 30, 2021	Dec. 31, 2021
Description of Company and Basis of Presentation [Line Items]
Number of retail locations | location			98
Number of distribution centers | center			11
Number of states in which entity operates | state			19
Number of top brands | brand			10
Economic interest of quality assets and operations						80.00%
OneWater LLC
Description of Company and Basis of Presentation [Line Items]
Ownership interest of parent			91.00%
Class A Common Stock
Description of Company and Basis of Presentation [Line Items]
Common stock, shares, issued (in shares)			14,420,129	14,211,621
September Offering | Class A Common Stock
Description of Company and Basis of Presentation [Line Items]
Number of shares issued (in shares)		3,170,868
Share price (in usd per share) | $ / shares		$ 20.00
Stock sold (in shares)		425,000
Common stock, shares, issued (in shares)		2,745,868
Period granted to underwriters		30 days
Number of additional shares intent to purchase by underwriters (in shares)	387,458	475,630
Proceeds from initial public offering | $		$ 8.1
Revenue Benchmark | Product Concentration Risk | Top Ten Brands
Description of Company and Basis of Presentation [Line Items]
Concentration risk, percentage			39.40%	41.80%	42.90%
Revenue Benchmark | Supplier Concentration Risk | Malibu Boats, Inc
Description of Company and Basis of Presentation [Line Items]
Concentration risk, percentage			13.90%	15.60%	17.00%