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v3.19.2

Note Receivables - Additional Information (Detail) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 11, 2019 | Apr. 30, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Interest rate |  |  | 5.00% |  | 5.00% |  |
Percentage of interest rate increase at the event of default |  |  |  |  | 10.00% |  |
Unsecured non-convertible note maturity date |  |  |  |  | Dec. 29, 2021 |  |
Interest income recognized |  |  | $ 628 | $ 421 | $ 1,223 | $ 840 |
Funding of AdvisorEngine Notes Receivable |  |  |  |  | $ 1,540 | $ 5,000 |
Unsecured Non-Convertible Note bears interest rate |  |  | 5.00% |  | 5.00% |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Fair value of unsecured non-convertible note receivable |  |  | $ 29,703 |  | $ 29,703 |  | $ 27,618
Unsecured Convertible Note [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Interest rate | 3.00% |  |  |  |  |  |
Funding of AdvisorEngine Notes Receivable |  | $ 1,540 |  |  |  |  |
Unsecured Non-Convertible Note bears interest rate | 3.00% |  |  |  |  |  |
Qualified Financing [Member] | Unsecured Convertible Note [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Debt instrument, convertible, terms of conversion feature | at a price per share equal to 80% of the price per share sold in such transaction. |  |  |  |  |  |
Non Qualified Non Corporate [Member] | Unsecured Convertible Note [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Debt instrument, convertible, terms of conversion feature | convertible note is repaid at a rate of 1.25 times the outstanding principal amount, plus accrued and unpaid interest |  |  |  |  |  |
Corporate Transaction [Member] | Unsecured Convertible Note [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Debt instrument, convertible, terms of conversion feature | convertible note would be repaid in cash from the proceeds of such transaction in the amount of 1.5 times the outstanding principal amount, plus any accrued and unpaid interest |  |  |  |  |  |

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