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Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 15, 2023 USD ($) | Mar. 31, 2024 USD ($) segment | Dec. 31, 2023 USD ($) segment | Mar. 31, 2023 USD ($) | Sep. 30, 2023 segment | Dec. 31, 2023 USD ($)
Concentration Risk [Line Items] |  |  |  |  |  |
Restricted cash |  | $ 10,000 | $ 10,000 |  |  | $ 10,000
Allowance for credit losses |  | 64 | $ 49 |  |  | 49
Payment to acquire building | $ 11,500 |  |  |  |  |
Long-lived asset impairment |  |  |  |  |  | $ 2,900
Advertising costs |  | $ 6,000 |  | $ 8,800 |  |
Number of operating segments | segment |  | 2 | 2 |  |  |
Number of reportable segments | segment |  | 2 | 2 |  | 1 |
Office space |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Payment to acquire building | 10,500 |  |  |  |  |
Useful life |  | 39 years |  |  |  |
Land |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Payment to acquire building | $ 1,000 |  |  |  |  |
Restricted stock units |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |
Two Developers | Revenue | Customer Concentration Risk |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage (less than) |  | 80.00% |  | 80.00% |  |
Customer One | Accounts Receivable | Customer Concentration Risk |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage (less than) |  | 18.00% |  |  |  | 12.00%
Customer Two | Accounts Receivable | Customer Concentration Risk |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk, percentage (less than) |  | 14.00% |  |  |  |

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