Description of Company and Basis of Presentation (Details) $ / shares in Units, $ in Thousands				12 Months Ended
	Sep. 29, 2020 shares	Sep. 22, 2020 USD ($) $ / shares shares	Feb. 11, 2020 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) Brand Location State Center $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($)	Dec. 31, 2021
Description of the Business [Abstract]
Number of retail locations | Location				96
Number of distribution centers | Center				12
Number of states in which business operating | State				19
Number of top brands | Brand				10
Public Offering [Abstract]
Proceeds from initial public offering | $				$ 0	$ 0	$ 59,234
Principles of Consolidation [Abstract]
Economic interest of quality assets and operations							80.00%
OneWater LLC [Member]
Principles of Consolidation [Abstract]
Ownership interest				90.90%
Legacy Owners [Member]
Public Offering [Abstract]
Payment in exchange for surrender of preferred distribution right | $			$ 3,200
Common Class A [Member]
Public Offering [Abstract]
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01
Common stock, shares issued (in shares)				14,211,621	13,276,538
Common Class B [Member]
Public Offering [Abstract]
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01
Common stock, shares issued (in shares)				1,429,940	1,819,112
Initial Public Offering [Member] | Common Class A [Member]
Public Offering [Abstract]
Number of shares issued (in shares)			5,307,693
Common stock, par value (in dollars per share) | $ / shares			$ 0.01
Number of shares issued on exercise of options (in shares)			692,308
Share price (in dollars per share) | $ / shares			$ 12
Proceeds from initial public offering | $			$ 59,200
September Offering [Member] | Common Class A [Member]
Public Offering [Abstract]
Number of shares issued (in shares)		3,170,868
Share price (in dollars per share) | $ / shares		$ 20
Proceeds from initial public offering | $		$ 8,100
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
Sales Revenue [Member] | Product Concentration Risk [Member] | Top Ten Brands [Member]
Description of the Business [Abstract]
Concentration risk percentage				41.80%	42.90%	41.10%
Sales Revenue [Member] | Product Concentration Risk [Member] | Malibu Boats, Inc [Member]
Description of the Business [Abstract]
Concentration risk percentage				15.60%	17.00%	17.00%