Tax Receivable Agreement and Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Income Tax Contingency [Line Items]
Percentage of net cash saving to be paid			85.00%
Percentage of net cash saving to be retained			15.00%
Total TRA liability recognized	$ 5,242	$ 5,242	$ 41	$ 5,242
Outside basis difference in partnership interest			0	6,200
Valuation allowance	460	460	7,709	460
Increase in valuation allowance			7,200
Payment on tax receivable agreement			0	100
Derecognition of tax receivable agreement liability			5,201	0
Uncertain tax positions	$ 0	$ 0	0	0
Penalties and interest related to uncertain tax positions			0	$ 0
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carryforwards			3,700
Domestic Tax Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carryforwards			$ 5,800
Common Class A | Direct Digital Management LLC
Income Tax Contingency [Line Items]
Number of units exchanged (in shares)	410,000	410,000	0	410,000