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Capital Requirements (Details) - USD ($) | Jul. 02, 2021 | Jun. 30, 2021 | Jan. 02, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
MSCO [Member] |  |  |  |
Net capital |  | $ 31,600,000 |  | $ 27,500,000
Minimum net capital required |  | 2,100,000 |  | 2,300,000
Net capital in excess of minimum requirement |  | $ 29,500,000 |  | $ 25,200,000
Percentage of aggregate debit balance to net capital |  | 30.60% |  | 24.30%
Cash deposits |  | $ 348,700,000 |  | $ 324,900,000
Minimum cash deposits required |  | 332,700,000 |  | 319,900,000
Cash deposits in excess of minimum requirement |  | 16,000,000 |  | 5,000,000.0
MSCO [Member] | Subsequent Event [Member] |  |  |  |
Cash deposits in excess of minimum requirement | $ 1,500,000 |  |  |
StockCross [Member] |  |  |  |
Cash deposits in excess of minimum requirement |  |  | $ 1,000,000.0 |
WPS [Member] |  |  |  |
Net capital |  | 2,800,000 |  | 3,900,000
Minimum net capital required |  | 250,000 |  | 250,000
Net capital in excess of minimum requirement |  | $ 2,500,000 |  | $ 3,700,000

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- Definition Minimum amount of net capital required to be maintained by broker-dealer subsidiary to engage in security transaction, calculated under Aggregate Indebtedness Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=116631393&loc=SL116631396-227033 + Details
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