Stockholders’ Deficit and Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands											1 Months Ended			3 Months Ended		12 Months Ended
	Jan. 12, 2026	Dec. 30, 2025 shares	Nov. 20, 2025 USD ($) shares	Oct. 24, 2025 shares	Oct. 15, 2025 USD ($)	Oct. 13, 2025 shares	Aug. 08, 2025 USD ($) $ / shares shares	Dec. 27, 2024 USD ($) shares	Oct. 18, 2024 USD ($) $ / shares	Feb. 15, 2022 $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares	Oct. 31, 2025 USD ($)	Nov. 30, 2023 shares	Mar. 31, 2026 USD ($) shares	Mar. 20, 2025 shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Sep. 30, 2025 shares	Jun. 09, 2025 shares
Share-Based Compensation
Preferred stock authorized (in shares)											10,000,000					10,000,000	10,000,000
Preferred stock par value (in dollar per share) \| $ / shares											$ 0.001					$ 0.001	$ 0.001
Warrants fair value \| $											$ 0					$ 0
Issuance of Series A Convertible Preferred Stock, net of issuance costs \| $																30,748
Less: Series A preferred stockholders cumulative and deemed dividends \| $																$ 1,100
Cumulative preferred dividends in arrears, per share (in dollars per share) \| $ / shares																$ 41.47
Accrued dividend \| $											55					$ 55	$ 0
Weighted average fair value of awards (in dollars per share) \| $ / shares																$ 200,000
Restricted stock units
Share-Based Compensation
Number of shares issued in transaction (in shares)															451
Weighted-average period over which unamortized stock-based compensation expense will recognized (in years)																6 months 18 days
Number of shares withheld (in shares)																1,212
Unrecognized stock-based compensation related to unvested RSUs \| $											$ 300					$ 300
2022 Omnibus Plan
Share-Based Compensation
Number of shares reserved for issuance (in shares)											63,636					63,636
Number of shares issuable (in shares)		163,636																	72,727
Shares available for grant											254,309					254,309
Stock-based compensation recognized \| $																$ 1,500	$ 1,600
2022 Omnibus Plan \| Options to purchase common stock
Share-Based Compensation
Contractual period (in years)																10 years
Weighted average fair value of awards (in dollars per share) \| $ / shares																$ 53.90
Unrecognized stock-based compensation related to stock options \| $											$ 200					$ 200
Number of shares related to unvested stock options (in shares)											11,080					11,080
Weighted-average period over which unamortized stock-based compensation expense will recognized (in years)																8 months 1 day
Subsequent Event
Share-Based Compensation
Reverse stock split	0.018
Maximum \| Restricted stock units
Share-Based Compensation
Vesting period (in years)																3 years
Maximum \| 2022 Omnibus Plan \| Options to purchase common stock
Share-Based Compensation
Vesting period (in years)																3 years
Minimum \| Restricted stock units
Share-Based Compensation
Vesting period (in years)																1 year
Minimum \| 2022 Omnibus Plan \| Options to purchase common stock
Share-Based Compensation
Vesting period (in years)																1 year
New Circle Principal Investments LLC
Share-Based Compensation
Share purchase agreement, maximum amount \| $									$ 100,000
Share purchase agreement, maximum issuable amount, percent									19.99%
Sale of stock, number of shares authorized (in shares)		1,818,181				909,090		154,545
Legal fees \| $								$ 100
Share purchase agreement, termination written notice period									36 months
Share purchase agreement, termination written notice period									5 days
Continuation Capital, Inc.
Share-Based Compensation
Settlement agreement, exchange shares selling price percentage			76.00%
Valuation period, trading days			5 days
Measurement Input, Discount Rate
Share-Based Compensation
Measurement input											0.0194					0.0194
Measurement Input, Expected Term
Share-Based Compensation
Warrants exercise price (in dollars per share)											5 years					5 years
Measurement Input, Price Volatility
Share-Based Compensation
Measurement input											0.66					0.66
Measurement Input, Expected Dividend Rate
Share-Based Compensation
Measurement input											0					0
Warrant
Share-Based Compensation
Stock and warrants issued during period, shares, options exercised (in shares)													190			190
IPO
Share-Based Compensation
Number of shares of common stock (in shares)										1
Reverse stock split										0.018
Number of warrants to purchase each share (in shares)										1
Warrants exercise price (in dollars per share) \| $ / shares										$ 302.50
Over-Allotment Option
Share-Based Compensation
Purchase option - number of additional units (in shares)										2,545
Exercise price of additional units (in dollars per share) \| $ / shares										$ 363.00
Public offering price per unit sold (as percent)										120.00%
Stock and warrants issued during period, shares, options exercised (in shares)													1,272			1,272
Common Class A
Share-Based Compensation
Common stock, authorized (in shares)						760,000,000					760,000,000					760,000,000	160,000,000	160,000,000
Common stock, par value (in dollars per share) \| $ / shares											$ 0.001					$ 0.001	$ 0.001
Preferred stock increased (in shares)											10,000					10,000
Units of share converted (in shares)																545,455
Common Class A \| New Circle Principal Investments LLC
Share-Based Compensation
Common stock, par value (in dollars per share) \| $ / shares									$ 0.001
Issuance of Class A common stock, net of transaction costs (in shares)				1,818				1,141
Number of shares issued in transaction (in shares)																433,806	28,727
Consideration received on transaction \| $																$ 7,300	$ 3,000
Common Class A \| Continuation Capital, Inc.
Share-Based Compensation
Number of shares issued in transaction (in shares)											209,162
Consideration received on transaction \| $			$ 3,000
Settlement agreement, settlement fee paid by shares (in shares)			1,727
Settlement agreement, related to third party vendor payables \| $											$ 700
Common Class A \| Continuation Capital, Inc. \| Subsequent Event
Share-Based Compensation
Number of shares issued in transaction (in shares)														608,164
Settlement agreement, related to third party vendor payables \| $														$ 900
Common Class A \| Continuation Capital, Inc. \| Maximum
Share-Based Compensation
Number of shares issued in transaction (in shares)			909,090
Common Class A \| Over-Allotment Option
Share-Based Compensation
Warrants exercise price (in dollars per share) \| $ / shares										$ 0.66
Purchase option - number of warrants (in shares)										381
Public offering price per warrant sold (as percent)										120.00%
Common Class B
Share-Based Compensation
Common stock, authorized (in shares)											20,000,000					20,000,000	20,000,000
Common stock, par value (in dollars per share) \| $ / shares											$ 0.001					$ 0.001	$ 0.001
Series A convertible preferred stock
Share-Based Compensation
Conversion of stock, shares converted (in shares)																7,923
Preferred stock authorized (in shares)							25,000				35,000					35,000
Preferred stock par value (in dollar per share) \| $ / shares											$ 0.001					$ 0.001
Preferred stock, authorized amount \| $							$ 25,000
Issuance of Series A Convertible Preferred Stock, net of issuance costs \| $					$ 10,000
Preferred stock, convertible, conversion price (in dollars per share) \| $ / shares											$ 1,000					$ 1,000
Preferred dividend																10.00%
Preferred stock, shares outstanding											12,525					12,525
Accumulated conversion value, conversion price (in dollars per share) \| $ / shares							$ 137.50
Accumulated conversion value thereof							3
Accrued dividend \| $											$ 100					$ 100
Deemed dividends on preferred stock \| $												$ 3,300
DDH LLC
Share-Based Compensation
Noneconomic voting rights (as a percent)																100.00%
Direct Digital Management LLC \| Common Class A
Share-Based Compensation
Conversion of stock, shares converted (in shares)																28,955	0
Number of shares of common stock (in shares)											1					1
Direct Digital Management LLC \| Common Class B
Share-Based Compensation
Number of shares of common stock (in shares)											168,645					168,645

Direct Digital Holdings, Inc. 10-K