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Related Party Transactions - Summary of Earn Out Shares Issued by Company to Platinum Stockholder (Details) - Platinum Stockholder - $ / shares shares in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Jan. 27, 2020 | Apr. 26, 2019
Common Stock Price Greater than $13.00 |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds |  |  |  | $ 13.00
Common Stock Price Greater than $15.50 |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds |  |  | $ 15.50 |
Verra Mobility Business Combination | Common Stock Price Greater than $13.00 | Earn-Out Agreement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds | [1] | $ 13.00 |  |
One-time issuance of shares |  | 2,500,000 |  |
Verra Mobility Business Combination | Common Stock Price Greater than $15.50 | Earn-Out Agreement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds | [1] | $ 15.50 |  |
One-time issuance of shares |  | 2,500,000 |  |
Verra Mobility Business Combination | Common Stock Price Greater than $18.00 | Earn-Out Agreement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds |  | $ 18.00 |  |
One-time issuance of shares |  | 2,500,000 |  |
Verra Mobility Business Combination | Common Stock Price Greater than $20.50 | Earn-Out Agreement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Common Stock Price thresholds |  | $ 20.50 |  |
One-time issuance of shares |  | 2,500,000 |  |
[1] | The first and second tranches of Earn-Out Shares have been issued, as discussed below.

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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