CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Total revenues	$ 8,157	$ 22,275
Cost of revenues
Total cost of revenues	5,764	17,277
Gross profit	2,393	4,998
Operating expenses
Compensation, taxes and benefits	3,664	4,524
General and administrative	2,653	3,281
Total operating expenses	6,317	7,805
Loss from operations	(3,924)	(2,807)
Other income (expense)
Other income	28	85
Expenses for Equity Reserve Facility	(198)	0
Interest expense	(1,846)	(1,297)
Total other expense, net	(2,016)	(1,212)
Loss before income taxes	(5,940)	(4,019)
Income tax benefit	0	(200)
Net loss	(5,940)	(3,819)
Net loss attributable to noncontrolling interest	(3,585)	(3,044)
Net loss attributable to Direct Digital Holdings, Inc.	$ (2,355)	$ (775)
Net loss per common share attributable to Direct Digital Holdings, Inc.:
Basic (in dollars per share)	$ (0.35)	$ (0.22)
Diluted (in dollars per share)	$ (0.35)	$ (0.22)
Weighted-average number of shares of common stock outstanding:
Basic (in shares)	6,710,000	3,509,000
Diluted (in shares)	6,710,000	3,509,000
Sell-side advertising
Revenues
Total revenues	$ 2,028	$ 16,500
Cost of revenues
Total cost of revenues	2,638	14,807
Buy-side advertising
Revenues
Total revenues	6,129	5,775
Cost of revenues
Total cost of revenues	$ 3,126	$ 2,470