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ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 03, 2023 | Feb. 01, 2022 | Jan. 04, 2022 | Sep. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |  |  |  |
Measurement period adjustments |  |  |  | $ 0 | $ 0 | $ 6,269
One River Digital Asset Management, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash subject to an indemnity holdback | $ 6,000 |  |  |  |  |
Number of shares to subject to indemnity holdback (in shares) | 119,991 |  |  |  |  |
Holdback release term | 18 months |  |  |  |  |
Total acquisition costs | $ 2,600 |  |  |  |  |
Unbound Security, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, provisional information, initial accounting incomplete, adjustment, other noncurrent assets |  |  |  |  |  | 4,100
Measurement period adjustments |  |  |  |  |  | 4,100
Cash subject to an indemnity holdback |  |  | $ 21,700 |  |  |
Holdback release term |  |  | 18 months |  |  |
Total acquisition costs |  |  | $ 3,000 |  |  |
Unbound Security, Inc. | Class A common stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of shares to subject to indemnity holdback (in shares) |  |  | 85,324 |  |  |
FairXchange, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, provisional information, initial accounting incomplete, adjustment, other noncurrent assets |  |  |  |  |  | 300
Measurement period adjustments |  |  |  |  |  | $ 300
Cash subject to an indemnity holdback |  | $ 4,700 |  |  |  |
FairXchange, Inc. | Class A common stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of shares to subject to indemnity holdback (in shares) |  | 83,035 |  |  |  |
FairXchange, Inc. | Common Stock, Not Subject to Indemnity Holdback | Class A common stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of shares included in purchase consideration (in shares) |  | 170,397 |  |  |  |
FairXchange, Inc. | General and administrative |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total acquisition costs |  | $ 1,100 |  |  |  |

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