Broker-Dealers and Clearing Organizations, Other Receivables and Prepaid Expenses and Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
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| Brokers And Dealers [Line Items] | ||||
| Receivables from Brokers-Dealers and Clearing Organizations | $ 11,884 | $ 7,395 | ||
| Broker -Dealers And clearing Organization [Member] | ||||
| Brokers And Dealers [Line Items] | ||||
| Receivables from Brokers-Dealers and Clearing Organizations | $ 11,900 | $ 7,400 | ||
| Allowance for Doubtful Accounts Receivable | 600 | 500 | ||
| Broker -Dealers And clearing Organization [Member] | Other Receivable [Member] | ||||
| Brokers And Dealers [Line Items] | ||||
| Accounts Receivable, Net | $ 5,300 | $ 5,200 |
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- References No definition available.
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- Definition For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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