Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements of Broker-Dealer Subsidiaries - Additional Information (Detail)

v3.10.0.1
Net Capital Requirements of Broker-Dealer Subsidiaries - Additional Information (Detail) - National Securities [Member]
Mar. 31, 2018
USD ($)
Net Capital $ 11,900,000
Excess Net Capital at 1000 Percent 10,900,000
Minimum Net Capital Required for Broker-Dealer Subsidiary $ 1,000,000