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Summary of Significant Accounting Policies - Narrative (Details) |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 10, 2022 USD ($) $ / shares shares | Dec. 21, 2021 USD ($) shares | Dec. 29, 2020 $ / shares shares | Dec. 31, 2023 USD ($) segment $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |
Operating cash flows |  |  |  | $ (5,932,000) | $ (60,321,000) | $ (48,186,000) |
Working capital |  |  |  | $ 90,900,000 |  |  |
Number of operating segments | segment |  |  |  | 1 |  |  |
Allowance for doubtful accounts |  |  |  | $ 0 | 0 |  |
Prepaid expenses |  |  |  | 7,500,000 | 5,600,000 |  |
Short-term investments |  |  |  | 3,100,000 | 0 |  |
Payments to acquire businesses and interest in affiliates |  |  |  | 2,000,000 | 1,500,000 |  |
Impairment |  |  |  | 0 | 0 |  |
Earnout interests liability |  |  |  |  |  | 0 | $ 351,048,000
Conversion ratio |  |  | 0.5 |  |  |  |
Fair value of private warrants |  |  |  | 0 | 0 | 0 | $ 170,109,000
Foreign currency translation adjustment |  |  |  | 900,000 | (1,900,000) | $ (100,000) |
Surety Bond, Satisfy Regulatory Requirements to Secure Cash Held for Customers |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Surety bonds |  |  |  | 28,000,000 |  |  |
Surety Bond, Satisfy Regulatory Requirements Necessary to Operate |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Surety bonds |  |  |  | $ 4,600,000 | 3,600,000 |  |
Media Content |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 2 years |  |  |
Public Warrants |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Cash proceeds from warrants exercised |  |  |  |  | $ 131,600,000 |  |
Warrants outstanding (in shares) | shares |  |  |  | 0 | 0 | 11,500,000 |
Private Warrants |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  |  |  | 0 | 0 | 6,675,000 |
Owners Other Than Rush Street Interactive | RSILP |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Noncontrolling ownership interest |  |  |  | 67.51% | 70.55% | 72.20% |
Special Limited Partner |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Tax receivable agreement, percentage of net certain tax benefits payable |  |  | 85.00% |  |  |  |
Special Limited Partner | RSILP |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Controlling ownership interest |  |  |  | 0.3249 |  |  |
IPO | Public Warrants |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of shares issuable per warrant (in shares) | shares |  |  | 1 |  |  |  |
Exercise price of warrants (in USD per share) | $ / shares |  |  | $ 11.50 |  |  |  |
IPO | dMy Technology Group, Inc. |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of units issued (in shares) | shares |  |  | 23,000,000 |  |  |  |
Price per unit (in USD per share) | $ / shares |  |  | $ 10.00 |  |  |  |
Private Placement | dMy Technology Group, Inc. | Private Warrants |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of units issued (in shares) | shares |  |  | 6,600,000 |  |  |  |
Minimum | Computer Software, Intangible Asset |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 3 years |  |  |
Maximum | Computer Software, Intangible Asset |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 4 years |  |  |
Maximum | Developed Technology |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Finite-lived intangible asset, useful life |  |  |  | 8 years |  |  |
ROI Assets |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Payments for asset acquisition |  | $ 3,300,000 |  |  |  |  |
ROI Assets | Intellectual Property |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Asset acquisition, legal fees |  | 100,000 |  |  |  |  |
Asset acquisition, capitalized amount |  | 5,900,000 |  |  |  |  |
Payments for asset acquisition |  | $ 5,800,000 |  |  |  |  |
Rush Street Productions, LLC |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Finite-lived intangible asset, useful life | 5 years |  |  |  |  |  |
Payments to acquire productive assets | $ 1,500,000 |  |  |  |  |  |
Cash- DMYT trust and cash, net of redemptions | 700,000 |  |  |  |  |  |
Assumed outstanding liabilities | 500,000 |  |  |  |  |  |
Asset acquisition, legal fees | 400,000 |  |  |  |  |  |
Asset acquisition, capitalized amount | 4,200,000 |  |  | $ 4,700,000 |  |  |
Acquisition fees | 400,000 |  |  |  |  |  |
Rush Street Productions, LLC | Trademark Asset |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Capitalized trademark intangible asset | $ 5,100,000 |  |  |  |  |  |
Class A Common Stock |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Common stock, par value (in USD per share) | $ / shares |  |  |  | $ 0.0001 | $ 0.0001 |  |
Class A Common Stock | Private Warrant Holder |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of shares issuable per warrant (in shares) | shares |  |  | 1 |  |  |  |
Fair value per share (in USD per share) | $ / shares |  |  | $ 11.50 |  |  |  |
Class A Common Stock | Special Limited Partner |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Common stock, par value (in USD per share) | $ / shares | $ 0.0001 |  |  |  |  |  |
Class A Common Stock | IPO | dMy Technology Group, Inc. |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Conversion ratio |  |  | 1 |  |  |  |
Class A Common Stock | ROI Assets |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Asset acquisition, shares transferred (in shares) | shares |  | 158,127 |  |  |  |  |
Asset acquisition, value of shares transferred |  | $ 2,500,000 |  |  |  |  |
Class A Common Stock | Rush Street Productions, LLC |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Asset acquisition, number of shares issued (in shares) | shares | 60,000 |  |  |  |  |  |
Asset acquisition, shares issued, value | $ 300,000 |  |  |  |  |  |
Warrant | Private Placement | dMy Technology Group, Inc. |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of units issued (in shares) | shares |  |  | 75,000 |  |  |  |
Class V Common Stock |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Common stock, par value (in USD per share) | $ / shares |  |  |  | $ 0.0001 | $ 0.0001 |  |
Class V Common Stock | Special Limited Partner |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Common stock, par value (in USD per share) | $ / shares | $ 0.0001 |  |  |  |  |  |
Class V Common Stock | Rush Street Productions, LLC |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Asset acquisition, shares issued, value | $ 2,400,000 |  |  |  |  |  |
RSILP Units | Rush Street Productions, LLC |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Asset acquisition, number of shares issued (in shares) | shares | 480,000 |  |  |  |  |  |

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